The solid shape for a book is a cube
Rectangle
A rectangle book has a rectangular shape, with four straight sides and four right angles.
Approximatively parallelepipedal
square the correct answer for that would be a prism
Stack.
It's call an orthorhomboid.
Approximatively a parallelepipedal
A hook shape
It's kinda like a book.
Pentagon
I think its a rectangular prism