it is hard and not necessary to read them all. but hope you could find useful content and like the post.
Here's an image of all the books available in the humblebundle crypto books offering.
Like someone said there are introductory video tutorials explaining bitcoin basics on khan academy, here: https://www.khanacademy.org/economics-finance-domain/core-finance/money-and-banking/bitcoin/v/bitcoin-what-is-it
https://www.coursera.org/learn/cryptocurrency/home/welcome also has a free course entitled: "bitcoin and cryptocurrency technologies, princeton university". I've done some of it, it goes into more detail than khan academy's video lecture series, but is difficult to understand in the way its formatted.
Udemy also has a course entitled: "Blockchain 101: The Basics".
https://www.udemy.com/blockchain101/
Their course is priced @ $10 and I've never tried it, so can't comment as to how good or bad it is.