Heart of Ice by Lis Wiehl

Cassidy has joined a gym and is attending Boot Camp led by Elizabeth. Cassidy is desperately trying to keep a young figure in order to not be passed up by the new young intern at Channel 4. She is enamored with Elizabeth from the beginning. Elizabeth has such exciting stories to tell. Cassidy is anxious to count Elizabeth among her friends.

Allison's sister Lyndsay shows up desperate for a place to stay. Their mother is practicing "tough love" and refuses to allow Lyndsay back into the house. Allison and Marshall allow Lyndsay to stay with them. Lyndsay is working on staying clean and sober. She takes up baking which causes Allison to start having a bit of a stomach. Encouraged by Cassidy she attends the Boot Camp at the gym.

Nicole has been tentative about dating fellow FBI agent Lief, but they have been exploring a relationship between them. When devastating news hits Nicole she breaks off with Lief and refuses to share any reason with him. Nicole is a private person, but finds that she needs to share her news with her best friends Allison and Cassidy.

The Triple Threat Club once again comes through for each other when their lives are touched by the evil of one woman.

This 3rd installment in the Triple Threat series was a bit different than the other 2 novels. In those we didn't know who the killer was until the end. In this one we know who the killer is and how she orchestrates everyone in her life. It was interesting to read how all of the clues were finally brought together and the mystery solved when we already knew who the killer was. I think this was my favorite one so far. I have the next book Eyes of Justice sitting here ready for me to pick up.