Tinyyyyyyyy book

How could this so small, it suppose to be bigger, but how? This book used to be big like normal book and then I became very small, who made it and why? I think my mother did it ,but how, maybe small flashlight from Doraemon... no way! So I went to ask my mother and she said "I don't know I didn't touch it". So how I can't read it! Ahhh I bought this book and I expected to read. I can just buy a new one instead but I want to know how could this happen, it wasted money!