Looking to build a 2D Platformer in Unity? I recommend you check out Weekend Code Project: Build A 2D Platformer In Unity by Jesse Freeman.
This book is a great resource to get started with if you are new to game development in Unity. It does a great job of teaching you how to build the various parts to a 2D platformer game step by step. It outlines what the current step is about, then shows the necessary code (in C#), and after that explains what the code is doing in the game. Super easy to follow!