These are the books by Susan Gates that are reviewed on this site:
Chingwe, the Missing Link, (maybe), rescued from a freak show, becomes an object of interest to scientists and fundamental Christians. Both sides feel they have a point to make. But Nemo, flea handler extraordinaire at his parent's flea circus, just wants Chingwe to enjoy a quiet old age . . .
Working together on a school project, Maddy and Flora discover the truth about a forty-year-old lie, and some truths about each other.