In this new book by Dita Křišťanová, you will learn how little Péťa once played in the garden with his dog Ferda, and during this fun they found something mysterious. Do you want to find out how it turned out with Péťa, the dog Ferda and their mysterious find and what they found mysterious? Open this book and a great adventure awaits you. Crack A story for lovers of dinosaurs and fun reading.