Written in 1920 by the British author Hugh Lofting, the Doctor Dolittle books were a series of children's novels about a man who learns to talk to animals and becomes their champion around the world. It was one of the novels in the series which was adapted into the 1967 film Doctor Dolittle.

Meet Ricky Ricotta, a little mouse with a big problem! Ricky Ricotta lives in Squeakyville with his mom and dad. Ricky has a hard time making friends at school, and the neighborhood bullies are always picking on him. If only Ricky could find someone to be his best buddy and keep those creepy bullies away! Meanwhile, on the other side of town, a mad scientist named Dr. Stinky McNasty has created a mighty robot who is as gentle as he is powerful. Dr. Stinky plans to make the robot destroy Squeakyville, but there's one little thing in his way: Ricky Ricotta!

In the first book in this series, eight-year-old Drake is snatched up by King Roland's soldier and taken to the castle. He is to be trained as a Dragon Master. At the castle, he is joined by three other young Dragon Masters-in-training: Ana, Rori, and Bo. The Dragon Masters must learn how to connect with and train their dragons - and they must also uncover their dragons' special powers.

中学生以降の歴史は、結局覚えないと答えられない暗記科目。でも、その前に知っておくべき常識的な知識があります。それを知らないで歴史の勉強をしても歴史そのものが理解できず

In the second book in this series, Drake and the other three Dragon Masters (Ana, Rori, and Bo) continue their training. But Ana's dragon, Kepri, is sick. The wizard tries to make her feel better, but his potions are not working. Drake's dragon, Worm, must use his special powers to take the Dragon Masters across the world in search of a cure. What made Kepri sick? Will the Dragon Masters be able to save her? And what dangers will they face along the way?