O QUE É, O QUE É?

What is it, what is it... that is made up of three volumes full of riddles that author Ruth Rocha collected over many years? That each of the volumes is illustrated by a different illustrator (the first by Maíra Chiodi, the second by Raul Fernandes, the third by André da Loba)? That has the pages cut into three equal strips and in each of them there is a riddle with a very small answer and upside down in the corner at the bottom? Which is really crazy, fun and colorful? What helps train quick thinking? What is good to play with friends and the whole family? 
Answer: the series What Is, What Is?, which Ruth Rocha prepared with great care for curious readers.