(Paperback)

Fifth-grader Ronnie and Ms. Lernin tour the Cenozoic Era, where they encounter three kinds of mammals--monotremes, marsupials, and placental mammals--and other animals with which they shared the Earth.

(Hardback)

Determined to show Ronnie just how interesting prehistoric life was "before" the age of dinosaurs. Miss Lernin takes her back in time to the Paleozoic era to study the earliest life forms on Earth, starting with the rise of the vertebrates.

(Paperback)

Originally published in hardcover in 2018 by Amulet Books.