The clock is ticking, the president is on the phone and
the bomb will detonate any moment. I'm nervous and
edgy, and I'm not even the one saving the world.

The wolves of Willoughby Chase
by Joan Aiken (1962)
First book in the Wolves of Willoughby Chase series

The demon headmaster
by Gillian Cross (1982)
First book in the Demon headmaster series
Emil and the detectives
by Erich Kastner (1929)
First book in the Emil and the detectives series

by Gabrielle Lord (2009)
First book in the Conspiracy 365 series