Secret Seven Fireworks

The Secret Seven series, written by Enid Blyton and illustrated by Tony Ross, follows a group of children who form a detective club and solve various mysteries. In the eleventh book, the Secret Seven are annoyed by Jack's younger sister Susie, who has started her own detective gang. Tensions rise when some money is stolen and Susie becomes the main suspect. The Secret Seven must work together to uncover the truth. The book, first published in 1959, includes classic text along with a Bonus Blyton section featuring quizzes, puzzles, and other extras. The series includes 15 original books and continues with new titles and a puzzle book.