Thanks for your reply!:)
Oh boy, I think you are in for a treat!
To begin, there is a book entitled better bouldering; although I haven't personally read the book, you can see a sample of the book here and decide if you would like to purchase it!
John Sherman has a series of books that I would recommend looking at if you want to improve all different types of climbing!
----Now if you want a book geared towards beginners I definitely recommend this book listed below---
So if you are new to climbing this book will help out a lot! However if you have looked up climbing techniques on YouTube, this book probably won't help you too much.
One thing I have noticed is technique is seldom thoroughly discussed especially on this sub, and people don't go in depth when they do discuss technique; another issue is technique is a lot more complicated than most people think. Technique covers a lot of areas and it would be quite a task for just one person write a book about it because technique can get so specific and well— technical.
I would like to contribute more about technique on this sub Reddit but to make a quality guide is quite a difficult task.
I could honestly talk about technique for weeks so if you have any questions I would love answer to best of my abilities!
I hoped I helped, have a great day my friend!