The Castlen Cousins

When a rare albino tiger disappears, most people see a headline. The Castlen Cousins see a mission. After losing their parents in a tragic plane crash, seven cousins refuse to be separated. Instead, they form their own detective agency—solving mysteries, uncovering secrets, and proving they are stronger together. Now, their biggest case begins. A stolen […]

The Castlen Cousins’ Detective Agency didn’t begin in a quiet writing room—it began in the middle of family chaos. This book is something rare: a story imagined by children and captured by grandparents. Every twist, every mystery, every daring moment was debated, voted on, and brought to life by seven cousins. As described in the