The main character is in his early 20's bald, allergic to the sun. He resides in a town that has a lot of weird things going on such as the unexplained disappearance of many children. The main character's parents were scientists on the military base which is supposed to be closed/abandoned. However even weirder things happen on the base such as mass animal suicides. There is a band of chimpanzees who are not "normal" roaming the base.
I believe that the book was part of a series chronicling the adventures of the main character and his band of odd friends onto the base and what they find and experience there. The main character believes he and all the "not normal" animals are products of military research/experiments.
I read the book around 11 or 12 years ago.
Any help in discovering this book/series name is greatly appreciated.