Archiving lets you hide books from your My Books library. Removing them from your Archive is easy!
Head to My Books > Archive on the website and click on the 3 dots on the bottom of a comic book that you'd like to remove from the Archive. Then choose "Unarchive."
If you have a group of books you'd like to remove from the Archive, you can choose "Select" on the top right of this page so that you can select multiple books at once to return.