how do you remove iBooks from an Iphone ?

Hello jennymatthews,

Welcome to the Apple Support Communities!

I understand that you would like to delete books from iBooks and podcast episodes from Podcasts. If this is the case, I would suggest reading over and working through the information in the attached article. This article addresses both books and podcasts, as well as a lot of other forms of media.

Delete music, movies, podcasts, and other content from your iPhone, iPad, iPod touch - Apple Support

Have a great day