best Unity3D book?

Hello everyone, I've been looking into buying a programming book. I'm thinking I'll buy one for Unity3D instead of general programming, as what I'm looking at right now is using Unity3D to make games. I have a good grasp of the basics and concepts of game programming in Unity3D, but my knowledge could definitely use a buffer from a good book, some structure to it.

So, my question is, does anyone know of any good Unity3D game programming books? I see multiple on amazon but was curious to know what the community thinks

(also, sorry if this is the wrong forum, didn't know if I should post here or in teaching)

 

Not sure about books - usually you use those for more specific topics like AI or physics.

Honestly, you best resource is the official one: https://unity3d.com/learn/tutorials/modules.