Oliver's Great Big Universe #3: Evolution Changes Everything!

Oliver wants a new computer because his old one is so slow that nobody enjoys using it with him. To earn the money, he decides to write and sell another book at school - this time about animals. As he researches the subject, his curiosity expands from where animals come from to the origins of life, exploring topics like primordial soup, dinosaurs, evolution, mass extinctions, and the animals we know today.

While working on his book, Oliver also earns extra money by doing odd jobs for his neighbors, including an elderly cat lover who turns out to be a famous retired paleontologist. Along the way, he learns more about the history of life on Earth while trying to balance his project, his friendships, and the challenges that come with working as a team.