Harlequin Intrigue Series, Books in Order by Year – 2021
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| # | Author | Book Title | Year |
| # 1971 | Julie Anne Lindsey | Impact Zone | 2021 |
| # 1972 | Elle James | Homicide at Whiskey Gulch | 2021 |
| # 1973 | Lena Diaz | Agent Under Siege | 2021 |
| # 1974 | Nichole Severn | The Fugitive | 2021 |
| # 1975 | Julie Miller | Dead Man District | 2021 |
| # 1976 | Elizabeth Heiter | Alaska Mountain Rescue | 2021 |
| # 1977 | Nicole Helm | Hunting a Killer | 2021 |
| # 1978 | K.D. Richards | Pursuit of the Truth | 2021 |
| # 1979 | Elle James | Hideout at Whiskey Gulch | 2021 |
| # 1980 | Nichole Severn | The Witness | 2021 |
| # 1981 | Danica Winters | A Loaded Question | 2021 |
| # 1982 | Cassie Miles | Cold Case Colorado | 2021 |
| # 1983 | Cindi Myers | Mountain Investigation | 2021 |
| # 1984 | Nichole Severn | The Prosecutor | 2021 |
| # 1985 | Julie Anne Lindsey | SVU Surveillance | 2021 |
| # 1986 | Danica Winters | Rescue Mission: Secret Child | 2021 |
| # 1987 | Caridad Pineiro | Cold Case Reopened | 2021 |
| # 1988 | Carla Cassidy | Stalker in the Shadows | 2021 |
| # 1989 | Rita Herron | The Secret She Kept | 2021 |
| # 1990 | Carol Ericson | The Setup | 2021 |
| # 1991 | Cindi Myers | Presumed Deadly | 2021 |
| # 1992 | Nichole Severn | The Suspect | 2021 |
| # 1993 | Julie Anne Lindsey | Protecting His Witness | 2021 |
| # 1994 | Elizabeth Heiter | K-9 Cold Case | 2021 |
| # 1995 | Delores Fossen | Her Child to Protect | 2021 |
| # 1996 | Carol Ericson | The Decoy | 2021 |
| # 1997 | Lena Diaz | Killer Conspiracy | 2021 |
| # 1998 | Nicole Helm | Summer Stalker | 2021 |
| # 1999 | Juno Rushdan | Innocent Hostage | 2021 |
| # 2000 | Janice Kay Johnson | Cold Case Flashbacks | 2021 |
| # 2001 | B.J. Daniels | Trouble in Big Timber | 2021 |
| # 2002 | Carol Ericson | The Bait | 2021 |
| # 2003 | Rachel Lee | Traces of Murder | 2021 |
| # 2004 | Lena Diaz | Deadly Double-Cross | 2021 |
| # 2005 | Nicole Helm | Shot Through the Heart | 2021 |
| # 2006 | Juno Rushdan | Unsuspecting Target | 2021 |
| # 2007 | Delores Fossen | Safeguarding the Surrogate | 2021 |
| # 2008 | Carol Ericson | The Trap | 2021 |
| # 2009 | Nichole Severn | Profiling a Killer | 2021 |
| # 2010 | Tyler Anne Snell | Uncovering Small Town Secrets | 2021 |
| # 2011 | Elizabeth Heiter | K-9 Hideout | 2021 |
| # 2012 | Denise N. Wheatley | Cold Case True Crime | 2021 |
| # 2013 | B.J. Daniels | Cold Case at Cardwell Ranch | 2021 |
| # 2014 | Barb Han | Decoding a Criminal | 2021 |
| # 2015 | Julie Miller | A Stranger on Her Doorstep | 2021 |
| # 2016 | Tyler Anne Snell | Searching for Evidence | 2021 |
| # 2017 | Danica Winters | A Judge’s Secrets | 2021 |
| # 2018 | Maggie Wells | An Absence of Motive | 2021 |
| # 2019 | Juno Rushdan | Tracing a Kidnapper | 2021 |
| # 2020 | Tyler Anne Snell | Surviving the Truth | 2021 |
| # 2021 | Danica Winters | K-9 Recovery | 2021 |
| # 2022 | Maggie Wells | For the Defense | 2021 |
| # 2023 | K.D. Richards | Missing at Christmas | 2021 |
| # 2024 | Janice Kay Johnson | Dead in the Water | 2021 |
| # 2025 | Caridad Pineiro | Trapping a Terrorist | 2021 |
| # 2026 | Debra Webb | The Bone Room | 2021 |
| # 2027 | Barb Han | Texas Baby Conspiracy | 2021 |
| # 2028 | Julie Anne Lindsey | Kentucky Crime Ring | 2021 |
| # 2029 | Maggie Wells | Trial in the Backwoods | 2021 |
| # 2030 | K.D. Richards | Christmas Data Breach | 2021 |
| # 2031 | Barb Han | Texas Stalker | 2021 |
| # 2032 | Julie Anne Lindsey | Stay Hidden | 2021 |
| # 2033 | Juno Rushdan | Rogue Christmas Operation | 2021 |
| # 2034 | Julie Miller | K-9 Patrol | 2021 |
| # 2035 | Cassie Miles | Find Me | 2021 |
| # 2036 | Carla Cassidy | Deadly Days of Christmas | 2021 |
| # 2037 | Delores Fossen | Targeting the Deputy | 2021 |
| # 2038 | Rachel Lee | Christmas Bodyguard | 2021 |
| # 2039 | Barb Han | Texas Abduction | 2021 |
| # 2040 | Nicole Helm | Mountainside Murder | 2021 |
| # 2041 | Juno Rushdan | Alaskan Christmas Escape | 2021 |
| # 2042 | Denise N. Wheatley | Bayou Christmas Disappearance | 2021 |