My Dad Had a System and Gave Birth to Hundreds of Sisters.

There Is a Shortage of Books, Please Recommend, Please Don't Take Any Space! No Space Required! No Space

Please ask for books of all types, just don't take any space, don't take any space, don't take any space! ! ! It's best not to use cheat system! ! ! Also, be more rigorous in your writing, don't write an ancient text with a bunch of modern items, etc.! ! ! Asking for articles