Ibooks document to i-easy drive

I would like to copy , back and forth’ all documents that are currently located in my I-Books shelves.
How to proceed with the i-easy flash software rev 4
Thanks for your help

Same question with the documents currently stores in ‘Notes.

PS: I have a Ipad Air with 11.z.t update

marmotte il about i-easydrive, v4.2.2