Website to download books on iPhone with no buying or memberships?

I wanna read the magic tree house series by Mary Pope Osborne for fun because it was my favorite books from childhood but I can't seem to find any website or PDF of the books to read online or on my iPhone. Is there any way website, app or maybe download on a computer that I can read it without paying for or sign up for those websites that make you put in your credit card info

Look at your local public library. Most of them now offer digital books you can rent. There maybe a signup that comes with a fee for new members, but i'm not sure.

Goto "mylocallibrarywebsite.com"
sign up
get library card *unless you live in the 3rd world, China or a theocratic hell-hole they should give you free access to 10s of thousands of ebooks
DL OVERDRIVE to your mobile device
Sync
Voila

alternatively: Get a job and stop trying to illegally DL books and be an adult.