recomend ebike an battery building books

[luap321]

can any one recomend any books like
The Ultimate Do It Yourself Ebike Guide: Learn How To Build Your Own Electric Bicycle Paperback
or
DIY Lithium Batteries: How to Build Your Own Battery Packs
by Micah Toll
i have seen some of his videos on you tube an he seem a good clear source of infomation i have not brought the books yet last book i brought of amazon was like a panflet for £15
(i dont know whats happened to the font size )

 

[Nealh]

I read a lot on endless sphere about batteries and safety.