Red Bell - Callie Simmons, #4

Callie Simmons knew something was wrong when she found the stack of forged receipts under a co-worker's file cabinet almost a decade ago. She began her own personal investigation, putting pieces together here and there, when and where she could find them. She finally has enough to launch her attack. With nothing more than a hope for success, Callie flies to Fiji to confront the man she believes was responsible for the demise of the Atlas crew all those years ago.
But the Mars missions are a thing of the past. The man she thought was responsible for the disaster is now working on something much bigger. And it goes by code name Red Bell. This is Spacey's fifth novel, and the final installment in the Callie Simmons series.