Einstein the Penguin: The Case of the Polar Poachers by Iona Rangeley, illustrated by David Tazzyman. The third Einstein the Penguin book. Imogen has been busy with her new school, so Arthur has been handling the penguin visits on his own. Then penguins start disappearing from the wild, and the Stewart children and Einstein go back to being detectives — with a suspicion that old enemies are behind it.

Funny, warm and very British, with Tazzyman's scribbly illustrations throughout. Suggested ages 7–10. Reads best after the first two books.