FYI:
Besides all the WONDERFUL Infomation
@Bea-FL has provided (In addition, there is also your local Library to get eBooks & if Ya' have a library card can use Hoopla:
https://www.hoopladigital.com/ to not only borrow eBook, but anything the library has to offer, incluing movies/music/etc. ) . . .
So - Although some of this information has been posted before . . . Whether or not Ya' have a Kindle or another freestanding piece of equipment to read e-Books . . . AND - While you might be able to find other Free Apps/Programs for MS Windows/Androids/Apple products you use . . . This program is free and can be use on most Tablets/Computers/Phones to access, organize, convert files and read eBooks - both e-pub/pdf format . . . Matter of fact, I've found it very useful to use on both my much older PC Computer (running XP Pro)/Android Tablet: