Thank you Steve. Yes, the CS5 book is still in "print" and in "digital." Peachpit has some very good offers you won't find at Amazon.
There is also a print-ebook bundle for $37.79.
And there is an "all-digital" bundle of ebook, MOBI (kindle), and PDF for $22.39.
If all you want is the printed book or ebook, Amazon is the best prices.
Printed book is $21.02 with Amazon Prime, $14.89 (new) plus shipping, $9.82 (used) plus shipping.
The Kindle book alone is $12.60