A Harlequin Romance Series – Books in Order by Year 2018
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| No. | Author | Title | Year | Approx. $ |
| # 4599 | Jessica Gilmore | The Italian’s Unexpected Heir | 2018 | $2–5 |
| # 4600 | Barbara Wallace | From Doctor to Princess? | 2018 | $2–5 |
| # 4601 | Nina Singh | The Prince’s One-Night Baby | 2018 | $2–5 |
| # 4602 | Michelle Douglas | Falling for Her Fake Fiancé | 2018 | $2–5 |
| # 4603 | Marion Lennox | Reunited with Her Brooding Surgeon | 2018 | $2–5 |
| # 4604 | Rebecca Winters | A Ring to Take His Revenge | 2018 | $2–5 |
| # 4605 | Ally Blake | Pregnant with the Billionaire’s Baby | 2018 | $2–5 |
| # 4606 | Katrina Cudmore | The Best Man’s Baby | 2018 | $2–5 |
| # 4607 | Jennifer Faye | Bound by Her Shocking Secret | 2018 | $2–5 |
| # 4608 | Barbara Hannay | The Cattleman’s Convenient Bride | 2018 | $2–5 |
| # 4609 | Sophie Pembroke | Their One-Night Baby | 2018 | $2–5 |
| # 4610 | Kandy Shepherd | Falling for the Single Dad | 2018 | $2–5 |
| # 4611 | Therese Beharrie | A Wedding at Lavender Bay | 2018 | $2–5 |
| # 4612 | Kate Hardy | The Children’s Doctor’s Special Proposal | 2018 | $2–5 |
| # 4613 | Scarlet Wilson | The Princess’s Nine-Month Secret | 2018 | $2–5 |
| # 4614 | Fiona McArthur | Outback Midwife’s Surprise Family | 2018 | $2–5 |
| # 4615 | Ally Blake | Rescuing the Royal Runaway Bride | 2018 | $2–5 |
| # 4616 | Nina Milne | Marooned with the Millionaire | 2018 | $2–5 |
| # 4617 | Therese Beharrie | Tempted by the Billionaire Next Door | 2018 | $2–5 |
| # 4618 | Rosanna Battigelli | Swept Away by the Enigmatic Tycoon | 2018 | $2–5 |
| # 4619 | Ally Blake | Amber and the Rogue Prince | 2018 | $2–5 |
| # 4620 | Rebecca Winters | Falling for the Venetian Billionaire | 2018 | $2–5 |
| # 4621 | Jennifer Faye | Miss White and the Seventh Heir | 2018 | $2–5 |
| # 4622 | Sophie Pembroke | Road Trip with the Best Man | 2018 | $2–5 |
| # 4623 | Jessica Gilmore | Summer Romance with the Italian Tycoon | 2018 | $2–5 |
| # 4624 | Kate Hardy | Reunited at the Altar | 2018 | $2–5 |
| # 4625 | Kandy Shepherd | Best Man and the Runaway Bride | 2018 | $2–5 |
| # 4626 | Nina Singh | Tempted by Her Island Millionaire | 2018 | $2–5 |
| # 4627 | Susan Meier | Carrying the Billionaire’s Baby | 2018 | $2–5 |
| # 4628 | Cara Colter | Swept into the Tycoon’s World | 2018 | $2–5 |
| # 4629 | Therese Beharrie | Surprise Baby, Second Chance | 2018 | $2–5 |
| # 4630 | Rosanna Battigelli | Captivated by Her Italian Boss | 2018 | $2–5 |
| # 4631 | Marion Lennox | English Lord on Her Doorstep | 2018 | $2–5 |
| # 4632 | Michelle Douglas | The Million Pound Marriage Deal | 2018 | $2–5 |
| # 4633 | Nina Milne | Conveniently Wed to the Prince | 2018 | $2–5 |
| # 4634 | Andrea Bolter | The Italian’s Runaway Princess | 2018 | $2–5 |
| # 4635 | Scarlet Wilson | Cinderella’s New York Christmas | 2018 | $2–5 |
| # 4636 | Rebecca Winters | Wedding the Greek Billionaire | 2018 | $2–5 |
| # 4637 | Kate Hardy | A Diamond in the Snow | 2018 | $2–5 |
| # 4638 | Katrina Cudmore | Christmas with the Duke | 2018 | $2–5 |
| # 4639 | Jennifer Faye | Heiress’s Royal Baby Bombshell | 2018 | $2–5 |
| # 4640 | Barbara Wallace | Their Christmas Miracle | 2018 | $2–5 |
| # 4641 | Nina Singh | Christmas with Her Secret Prince | 2018 | $2–5 |
| # 4642 | Therese Beharrie | Her Festive Flirtation | 2018 | $2–5 |
| # 4643 | Sophie Pembroke | CEO’s Marriage Miracle | 2018 | $2–5 |
| # 4644 | Cara Colter | Snowbound with the Single Dad | 2018 | $2–5 |
| # 4645 | Donna Alward | Best Man for the Wedding Planner | 2018 | $2–5 |
| # 4646 | Leah Ashton | His Pregnant Christmas Princess | 2018 | $2–5 |
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.