Is it possible to import Kindle books into Books app on my iPad 2?

Dear community,

I am aware that the iPad 2 is quite old and it makes sense that apps like Kindle are not supported anymore at some point. I wanted to read the book "Positive Intelligence" which is not available on iBooks. Thus, I am looking for an alternative approach to read this and similar books. Can you possibly recommend other reading apps that are still supported on the iPad 2 or share an approach how I could import the kindle Book to iBooks?

Many thanks in advance!

[Re-Titled By Moderator]