A Harlequin Romance Series – Books in Order by Author – N
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| No. | Author | Title | Year | Approx. $ |
| # 1476 | Nan Asquith | Believe in Tomorrow | 1971 | $5–10 |
| # 898 | Nan Asquith | Doctor Robert Comes Around | 1965 | $3–10 |
| # 1284 | Nan Asquith | Only My Heart to Give | 1969 | $5–15 |
| # 1192 | Nan Asquith | The Certain Spring | 1968 | $4–12 |
| # 699 | Nan Asquith | The Doctor Is Engaged | 1962 | $5–15 |
| # 1734 | Nan Asquith | The Girl from Rome | 1973 | $4–10 |
| # 1753 | Nan Asquith | Time Change | 1974 | $3–8 |
| # 1411 | Nan Asquith | Turn the Page | 1970 | $3–10 |
| # 1261 | Nan Asquith | With All My Heart | 1968 | $5–15 |
| # 1 | Nancy Bruff | The Manatee | 1949 | $75–250 |
| # 2633 | Natalie Spark | Once More With Feeling | 1984 | $3–8 |
| # 2799 | Natalie Spark | One Life at a Time | 1986 | $3–6 |
| # 3878 | Natasha Oakley | A Family to Belong To | 2006 | $2–8 |
| # 3913 | Natasha Oakley | Accepting the Boss’s Proposal | 2006 | $2–8 |
| # 4072 | Natasha Oakley | Cinderella and the Sheikh | 2009 | $2–5 |
| # 3935 | Natasha Oakley | Crowned: An Ordinary Girl | 2007 | $3–5 |
| # 3838 | Natasha Oakley | For Our Children’s Sake | 2005 | $2–5 |
| # 3894 | Natasha Oakley | Ordinary Girl, Society Groom | 2006 | $2–8 |
| # 3854 | Natasha Oakley | The Business Arrangement | 2005 | $2–5 |
| # 4025 | Natasha Oakley | Wanted: White Wedding | 2008 | $2–5 |
| # 29 | Nelson C. Nye | Gunfighter Breed | 1950 | $15–40 |
| # 1268 | Nerina Hilliard | Dark Star | 1969 | $5–15 |
| # 2003 | Nerina Hilliard | Land of the Sun | 1976 | $3–8 |
| # 2040 | Nerina Hilliard | Sister to Meryl | 1977 | $1–$5 |
| # 1302 | Nerina Hilliard | Teachers Must Learn | 1969 | $5–15 |
| # 927 | Nerina Hilliard | The Scars Shall Fade | 1965 | $5–15 |
| # 557 | Nerina Hilliard | The Time Is Short | 1960 | $5–15 |
| # 4121 | Nicola Marsh | A Trip with the Tycoon | 2009 | $2–5 |
| # 4194 | Nicola Marsh | Deserted Island, Dreamy Ex! | 2010 | $2–6 |
| # 4008 | Nicola Marsh | Executive Mother-To-Be | 2008 | $2–5 |
| # 4252 | Nicola Marsh | Girl in a Vintage Dress | 2011 | $2–6 |
| # 3834 | Nicola Marsh | Hired by Mr. Right | 2005 | $2–5 |
| # 3866 | Nicola Marsh | Impossibly Pregnant | 2005 | $2–5 |
| # 3926 | Nicola Marsh | Inherited: Baby | 2006 | $2–8 |
| # 3960 | Nicola Marsh | Princess Australia | 2007 | $3–5 |
| # 4097 | Nicola Marsh | The Billionaire’s Baby | 2009 | $2–5 |
| # 4037 | Nicola Marsh | The Desert Prince’s Proposal | 2008 | $2–5 |
| # 3810 | Nicola Marsh | The Tycoon’s Dating Deal | 2004 | $2–5 |
| # 3944 | Nicola Marsh | The Tycoon’s Proposal | 2007 | $3–5 |
| # 3818 | Nicola Marsh | The Wedding Contract | 2004 | $2–5 |
| # 4173 | Nicola Marsh | Three Times a Bridesmaid… | 2010 | $2–6 |
| # 4343 | Nicola Marsh | Wedding Date with Mr. Wrong | 2012 | $2–8 |
| # 4290 | Nicola Marsh | Who Wants to Marry a Millionaire? | 2012 | $2–8 |
| # 3101 | Nicola West | A Woman’s Place | 1991 | $2–6 |
| # 2646 | Nicola West | Carver’s Bride | 1984 | $3–8 |
| # 2771 | Nicola West | Comeback | 1986 | $3–6 |
| # 2526 | Nicola West | Devil’s Gold | 1983 | $4–8 |
| # 2884 | Nicola West | Hidden Depths | 1988 | $3–8 |
| # 3168 | Nicola West | Last Goodbye | 1991 | $2–6 |
| # 2592 | Nicola West | No Room In His Life | 1983 | $5–10 |
| # 2760 | Nicola West | Sky High | 1986 | $3–6 |
| # 3089 | Nicola West | Snow Demon | 1990 | $3–6 |
| # 2640 | Nicola West | The Tyzak Inheritance | 1984 | $3–8 |
| # 2669 | Nicola West | Tormented Rhapsody | 1985 | $2–6 |
| # 2610 | Nicola West | Wildtrack | 1984 | $3–8 |
| # 4259 | Nikki Logan | A Kiss to Seal the Deal | 2011 | $2–6 |
| # 4418 | Nikki Logan | Awakened by His Touch | 2014 | $2–5 |
| # 4236 | Nikki Logan | Friends to Forever | 2011 | $2–6 |
| # 4466 | Nikki Logan | Her Knight in the Outback | 2015 | $3–6 |
| # 4152 | Nikki Logan | Lights, Camera…Kiss the Boss | 2010 | $2–6 |
| # 4361 | Nikki Logan | Shipwrecked with Mr. Wrong | 2013 | $3–6 |
| # 4328 | Nikki Logan | Slow Dance with the Sheriff | 2012 | $2–8 |
| # 4216 | Nikki Logan | The Soldier’s Untamed Heart | 2011 | $2–6 |
| # 4294 | Nikki Logan | Their Miracle Twins | 2012 | $2–8 |
| # 4174 | Nikki Logan | Their Newborn Gift | 2010 | $2–6 |
| # 4110 | Nina Harrington | Always the Bridesmaid | 2009 | $2–5 |
| # 4276 | Nina Harrington | Blind Date Rivals | 2011 | $2–6 |
| # 4414 | Nina Harrington | Her Holiday Prince Charming | 2014 | $2–5 |
| # 4248 | Nina Harrington | Her Moment in the Spotlight | 2011 | $2–6 |
| # 4146 | Nina Harrington | Hired: Sassy Assistant | 2010 | $2–6 |
| # 4336 | Nina Harrington | My Greek Island Fling | 2012 | $2–8 |
| # 4307 | Nina Harrington | The Boy Is Back in Town | 2012 | $2–8 |
| # 4230 | Nina Harrington | The Last Summer of Being Single | 2011 | $2–6 |
| # 4262 | Nina Harrington | The Ordinary King | 2011 | $3–8 |
| # 4170 | Nina Harrington | Tipping the Waitress with Diamonds | 2010 | $2–6 |
| # 4362 | Nina Harrington | When Chocolate Is Not Enough | 2013 | $3–6 |
| # 4840 | Nina Milne | A Kiss with the Irish Boss | 2023 | $3–8 |
| # 4714 | Nina Milne | Baby on the Tycoon’s Doorstep | 2020 | $2–6 |
| # 4912 | Nina Milne | Bound by Their Royal Baby | 2024 | N/A |
| # 4938 | Nina Milne | Cinderella’s Moroccan Midnight Kiss | 2025 | |
| # 4516 | Nina Milne | Claiming His Secret Heir | 2016 | $2–6 |
| # 4633 | Nina Milne | Conveniently Wed to the Prince | 2018 | $2–5 |
| # 4789 | Nina Milne | Falling Again for the Single Dad | 2022 | $2–5 |
| # 4826 | Nina Milne | Falling for His Stand-In Fiancée | 2022 | $2–5 |
| # 4662 | Nina Milne | Hired Girlfriend, Pregnant Fiancée? | 2019 | $2–6 |
| # 4896 | Nina Milne | His Princess on Paper | 2024 | N/A |
| # 4750 | Nina Milne | Italian Escape with the CEO | 2021 | $2–6 |
| # 4616 | Nina Milne | Marooned with the Millionaire | 2018 | $2–5 |
| # 4880 | Nina Milne | New Year with the Greek | 2023 | $3–8 |
| # 4672 | Nina Milne | One Night to Wedding Vows | 2019 | $2–6 |
| # 4967 | Nina Milne | Secret Royal’s Napoli Reunion | 2025 | |
| # 4545 | Nina Milne | The Billionaire’s Festive Proposal | 2016 | $2–5 |
| # 4806 | Nina Milne | The Secret Heir’s Return | 2022 | $2–5 |
| # 4691 | Nina Milne | Their Christmas Royal Wedding | 2019 | $2–6 |
| # 4957 | Nina Milne | Their Mauritius Wedding Ruse | 2025 | |
| # 4765 | Nina Milne | Whisked Away by the Italian Tycoon | 2021 | $2–6 |
| # 4919 | Nina Singh | Bound by the Boss’s Baby | 2024 | N/A |
| # 4641 | Nina Singh | Christmas with Her Secret Prince | 2018 | $2–5 |
| # 4566 | Nina Singh | Claiming His Wedding Night Consequence | 2017 | $3–6 |
| # 4760 | Nina Singh | From Tropical Fling to Forever | 2021 | $2–6 |
| # 4777 | Nina Singh | From Wedding Fling to Baby Surprise | 2021 | $2–6 |
| # 4710 | Nina Singh | Her Billionaire Protector | 2020 | $2–6 |
| # 4736 | Nina Singh | Her Inconvenient Christmas Reunion | 2020 | $2–6 |
| # 4530 | Nina Singh | Her Unexpected Hero | 2016 | $2–5 |
| # 4856 | Nina Singh | Maid for the Greek Billionaire | 2023 | $3–8 |
| # 4650 | Nina Singh | Maid for the Greek’s Ring | 2019 | $2–6 |
| # 4887 | Nina Singh | Part of His Royal World | 2024 | N/A |
| # 4937 | Nina Singh | Prince’s Proposal for the Canadian Cameras | 2025 | |
| # 4965 | Nina Singh | Resisting His Cinderella Rival | 2025 | |
| # 4808 | Nina Singh | Reunited with Her Brooding Billionaire | 2022 | $2–5 |
| # 4595 | Nina Singh | Snowed In with the Reluctant Tycoon | 2017 | $3–6 |
| # 4726 | Nina Singh | Spanish Tycoon’s Convenient Bride | 2020 | $2–6 |
| # 4626 | Nina Singh | Tempted by Her Island Millionaire | 2018 | $2–5 |
| # 4446 | Nina Singh | The Marriage He Must Keep | 2014 | $2–5 |
| # 4578 | Nina Singh | The Marriage of Inconvenience | 2017 | $3–6 |
| # 4601 | Nina Singh | The Prince’s One-Night Baby | 2018 | $2–5 |
| # 4872 | Nina Singh | The Prince’s Safari Temptation | 2023 | $3–8 |
| # 4799 | Nina Singh | The Vet’s One-Night Twin Surprise | 2022 | $2–5 |
| # 4905 | Nina Singh | Their Accidental Marriage Deal | 2024 | N/A |
| # 4827 | Nina Singh | Wearing His Ring till Christmas | 2022 | $2–5 |
| # 452 | None Listed | Crescent Dream Book and Fortune Teller | 1959 | $10–35 |
| # 865 | Nora Sanderson | A Partner for Doctor Philip | 1964 | $5–20 |
| # 762 | Nora Sanderson | Hospital in New Zealand | 1963 | $6–18 |
| # 937 | Nora Sanderson | The Case for Nurse Sheridan | 1965 | $4–12 |
| # 847 | Nora Sanderson | The House of Hope | 1964 | $5–20 |
| # 752 | Nora Sanderson | The Ordeal of Nurse Thompson | 1963 | $6–18 |
| # 922 | Nora Sanderson | The Taming of Nurse Conway | 1965 | $4–12 |
| # 787 | Nora Sanderson | The Two Faces of Nurse Roberts | 1964 | $5–25 |
| # 96 | Norman A. Fox | The Rider From Yonder | 1951 | $10–30 |
| # 211 | Norman Lindsay | The Cautious Amorist | 1953 | $15–40 |
| # 1842 | Norrey Ford | Call to the Castle | 1975 | $3–8 |
| # 1172 | Norrey Ford | Let Love Abide | 1968 | $3–8 |
| # 495 | Norrey Ford | Nurse With a Dream | 1959 | $10–30 |
| # 1818 | Norrey Ford | One Hot Summer | 1974 | $3–8 |
| # 1139 | Norrey Ford | The House of My Enemy | 1967 | $4–10 |
| # 1115 | Norrey Ford | The Romantic Heart | 1967 | $4–10 |
| # 1248 | Norrey Ford | Where Is Love | 1968 | $5–15 |
Typical collector values are based on common paperback editions in Very Good condition. Exceptional condition, signed copies, or rare international editions may sell for more.