About the LendMe Feature on the Nook
One of the coolest features on the Barnes and Noble ereader, the Nook, is the "LendMe" feature. The "LendMe" feature is how to share Nook books with other Nook users who have a Nook, Nook Color, or Nook application for use on their iPhone or PC, along with a linked Barnes and Noble account.
First you send a request to lend your book to someone's e-mail address. The recipient of the request has seven days to respond to the lending opportunity. If they don't claim the book during that time, it will return back to your library at the end of seven days. During the seven-day response period, you will not have access to the book you lent out.
Once the person you sent the book to responds, he or she has 14 days to read the book. During that time, you will not have access to the book, so keep that in mind prior to lending. After the 14 days have passed, you will receive the access to the book again on your Nook, while the person you lent it to will no longer have access.
Be advised: You can only lend a book one time, and you cannot lend out books which have been lent to you. If a person does not accept your request to lend them the book, you can lend it again, but once your offer is accepted, that book is stuck on your shelf forever. Also, not every book can be lent, but only books with a "LendMe" icon on the cover.