Not the ABC series, but an entry in the Harlequin series inspired by it (among other sources). Darcy Steele goes undercover to find the truth about her friend's murder. A quick read without much oomph, but some nice moments.
This book was very good. It's one of the Athena Force books from the Bombshell series at Harlequin. Not a romance, this is a fast paced, suspense as a woman who was trained in a secret covert academy goes in hiding for 4 years to protect her son from her husband and only comes out when a friend (another member of the elite group) is murdered.