The e-book is also known as electronic books. the e-book is an application where you can study every type of book. Even you can edit, type, and text your message. The process of the e-book is new to the world. You don’t need to go to the library or to the market in order to buy a new book. Just the thing you need is a mobile phone or computer where you can open that e-book application and just search for the book you want to read.
There are a lot of people or retailers that are selling e-books some famous e-book retailers are eReader-compatible retailers include Amazon, Barnes & Noble, Kobo, and Google Play.
Here are the best ebook reader apps for Android!
•    Aldiko Book Reader.
•    Amazon Kindle.
•    AIReader.
•    FBReader.
•    Foxit PDF Reader.
•    FullReader.
•    Google Play Books.
•    Kobo Books.

https://www.lifehack.org/articles/technology/10-best-ebook-reader-apps-for-android-you-need-know.html#:~:text=1.,apps%20for%20smartphones%20and%20tablets.&text=Kindle%20is%20powered%20by%20technology,and%20notes%20across%20all%20devices.