Written by Guillaume Prévost. Tackk by Diana Sanchez
The Book Of Time
Sam finds a coin and that special coin takes him back in time. At first, he doesn't know what it is and what it has done, and he's lost in some sort of territory for monks. All he knows is that it was in the basement where his dad kept all his things. Little does he know-- it can help him find his father. But to do that, he'll have to find the coin in different shapes depending on the time.
The book is also a trilogy, and the picture(s) above is the first, then second book.