Lのナゾトキ解明

Source

Professor Layton and the Cheerful Mystery
Layton Kyouju to Yukai na Jiken· レイトン教授とユカイな事件
manga

Humorous oneshots about the Professor, his apprentices Luke and Flora, and his self-proclaimed arch-enemy, Don Paolo. As a bonus, each chapter contains actual puzzles, just like in the game! (Source: Hikigeki)