The Investigalibri Agency faces its most delicate case. So turn off the TV. Turn off the smartphone. Turn off everything. And turn on your imagination. Tommy Tevis and Nero Mouse have an almost impossible mission: to conquer millions of new readers! To succeed, they need an ace up their sleeve. And the winning card can only be him: Denton T. Ratt, the legendary bestselling author. Emotions, laughter and a surprise ending in the fourth and final adventure of the Investigalibri Agency. The book contains the Investigalibri Agency stickers! WITH STICKERS