Professional AJAX is a new book in the Wrox Programmer to Programmer-Series, written by Nicholas C. Zakas, Jermy McPeak and Joe Fawcett. Sreejith has reviewed it and thinks it is the best book on the topic so far.
(via AJAX Blog)
Craig Maloney has written a review on the book Foundations of AJAX by Ryan Asleson and Nathaniel T. Schutta, published by Apress.
Where Foundations of Ajax shines is it’s no-nonsense introduction, implementation, and expansion of the basics of Ajax programming, leaving the reader confidently ready to utilize the concepts within. The authors have seen the potential of Ajax, and competently convey their expertise and enthusiasm for this technology.
(found in AJAX Magazine)