I'll start off by saying that I really enjoyed this book. I am probably 15 years older than the target audience (being generous to myself, here). I think the illustrations were excellent. The content was a good mix of inspiring and realistic. However, the choice of three separate main narrators (plus occasionally Leakey) could easily confuse a preteen or teen reader. Using different colors helped to distinguish who was narrating, but it wasn't always easy to realize who was speaking the dialogue. Different fonts were used for this, but to me, only Jane Goodall's cursive stood out. The other two were too similar. I think this would have worked better as an interconnected trilogy where each scientist had her own book and Leakey linked them together across the books.

This is a quick read. My students will pick it up without much prompting and my lower level readers will gain confidence from it, especially if I can warn them first about the shifts in narrator and how to tell who is who while reading.