Manatee Blues - Vet Volunteers, Bk 4 Author:Laurie Halse Anderson Dr. Mac has brought Brenna, Maggie, and Zoe to Florida to visit her friend Gretchen, a marine biologist who runs a manatee rescue center that's in desperate need of money. Brenna's immediately drawn to the endangered, gentle giants, and wants to do whatever she can to help them -- and the center. But is she causing trouble where she want... more »s to help?« less