Bestseller Kava takes a break from her Maggie O'Dell FBI profiler series (A Necessary Evil, etc.) with a fine topical thriller involving terrorism, government coverups and toxic waste. Sabrina Galloway, a young Chicago professor, becomes a hands-on scientist in Florida with EcoEnergy, a company that specializes in TCP--a process that converts refuse and other waste material into oil. EcoEnergy's CEO is angling for a $140 million military government contract, but after Sabrina's boss mysteriously disappears and Sabrina discovers a reactor processing something it shouldn't, her life becomes as endangered as Florida's waterways. She hits the road in a '47 Studebaker with Miss Sadie, a gutsy 81-year-old African-American neighbor, to find help, while Middle Eastern terrorists plot a nasty surprise for an upcoming energy summit. Engaging supporting characters include Leon, a funky hit man losing his touch but not his heart, and covert operative Natalie Richards, "a black Emma Peel." Kava lightens the seriousness with some deft touches of humor. Genre fans weary of serial-killer fare will find this a refreshing read. (June) Copyright 2007 Reed Business Information.