We don’t have proper paper copies of the Endnote X manual for loan in the Library as it is available as a pdf with the software on the network. However, it is a very large file. Paper copies are available for reference in my office in the Robinson Library and also via Linda Simpson in the Walton Library.
However, there are some books about Endnote available for reference and loan:
Endnote 1-2-3 Easy is at 005.74AGR in QR Level 4 (plus a loan copy at 005.74END)
Manuscript writing using Endnote and Word is at 371.30281AGR Study skills L4 (loan at 371.30281EDH)