On both this blog and my Amy's Bookshelf Reviews website, there is a list of the banned, burned or challenged books that are linked to a google spreadsheet so that it can be updated easily.
However, if you want an easy way to purchase some of the banned books, if you go to The Official Blog of Amy Shannon at
The books are listed there, and have links (whenever possible), so all you have to do is click on a link (it'll have an underline, and it will bring you right to the book where you can purchase (most of them are amazon.com links, so if you're from another country, you'll need to search for the equivalent link to the amazon site for your particular country.