I have collected useful e-books about jQuery. You can download the file from the link below.

The file contains the following:

• e-Books
  • jQuery in Action (Feb 2008)
  • jQuery Reference Guide
  • jQuery UI 1.6 (Feb 2009)
  • jquery_1.3_cheatsheet_v1
  • Learning jQuery 1.3 (Feb 2009)
• Source Codes and Examples for each e-book.

The file is located here: download it (on 4shared).