How to delete books from nook library - Barnes & Noble Nook By Barnes And Noble 3g wi-fi Ereader Ebook Reader

Click on the Libraries button again and you'll see you now have a new menu item showing your archived libraries. Click on this and choose the library you want to access. From this menu, you'll be able to see a list of the books that have beenarchived.Mar 15, 2018
https://support.bookcreator.com/hc/en-us/articles/115002206193-Archiving-a-library

Here's a pdf with instructions on how to remove books from a Nook. Scroll to the second page.
https://www.sos.wa.gov/_assets/library/libraries/projects/eBookPilot/policies_TacomaPublic_NookSimpleTouch.pdf

https://bookclubs.barnesandnoble.com/thread/11077 Deleting books from library

For some books, downloaded from your PC, the only way to delete them is to attach the Nook Simple Touch to your PC and open the Nook Simple Touch on the PC. (For a PC, open the computer icon and look for the Nook icon and click on that.) From your PC you can delete files from the Nook Simple Touch or move them off the Nook Simple Touch to your PC.
IF you have a MAC or if my advice doesn't work, you should contact the Nook support. It is at the Nook website. Click on Nook and look for Nook support.

With the latest Kindle update (Kindle for Android 4.9.0.158) holding your finger on the book will produce a menu at the top of the screen with: a check mark; DONE; + in a circle; trash can icon; and the 3 vertical dots. Touching the trash can icon will delete the book from the android device, but it will remain in your Amazon Kindle library.

Contact the library and ask if you can renew the loan

Launch the reader.

go to your library

tap and hold the book cover, a drop down list should appear.

select delete from devise.

hope this helps

Download all the archived and unarchived books and save them to your computer. Never deleted these.
You have two options for the archived books.
Un-archive them and they will appear on your nook and download as you see fit.
OR... Sideload them. Which is probably what you did before since archived books already disappear from your My B&N Library and would have had to be in your My Documents Library.
Not exactly sure what you mean by 'does not go to my nook' when you try and save/download from the website.

If still having any kind of issue then you can take nook support from experts or call nook help number.