Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | The Secret Network | 2021 | Bonnie Vanak | Buy |
| 2 | Unlikely Alibi | 2021 | Bonnie Vanak | Buy |
| 3 | Undercover Heat | 2021 | Bonnie Vanak | Buy |
| 4 | Soldier’s Return | 2021 | Bonnie Vanak | Buy |
| 5 | Hidden Target | 2021 | Bonnie Vanak | Buy |
| 6 | Guardian in the Storm | 2021 | Bonnie Vanak | Buy |
| 7 | Secret Defender | 2021 | Bonnie Vanak | Buy |
| 8 | Temptation Undercover | 2021 | Bonnie Vanak | Buy |
| 9 | Forged in Fire | 2021 | Bonnie Vanak | Buy |
| 10 | Desperate Ransom | 2021 | Bonnie Vanak | Buy |
| 11 | Secret Alibi | 2021 | Bonnie Vanak | Buy |
| 12 | Colton 911: Secret Alibi | 2021 | Bonnie Vanak | Buy |
| 13 | Under Suspicion | 2021 | Bonnie Vanak | Buy |
The Colton 911: Chicago series is part of Harlequin’s long-running Colton franchise, where multiple romance authors write connected novels about members of the extended Colton family. Bonnie Vanak contributed Undercover Heat (2021) to the Chicago arc, which focuses on a branch of the Colton family dealing with various threats in the city.
The 13-book Chicago run was published entirely in 2021, with each book written by a different author and focusing on a different Colton family member’s romance and the overarching mystery threatening the family. Other contributors to the arc include authors like Dana Nussio, Colleen Thompson, and Karen Whiddon.