Often books are used as a measure of success for a technology platform. For instance, O’Reilly used to publish a bi-yearly report on the state of the technology book market. (They may still, though I can’t find one more recent than last year.)
And since today I received an email letting me know that a new book called “Effortless Flex 4 Development” was released (written by Larry Ullman, a well known author of many technology books), I decided to check Amazon to see how many Flex 4 books have been released.
A quick search for “flex 4” yielded 18 results for published and soon to be published books on Flex 4, plus one curiously titled “Handbook of School-Gymnastics of the Swedish System” (Note to Amazon: you may want to work on your search algorithm.)
The highest rated book is from Adobe: Adobe Flex 4: Training from the Source, Volume 1. The second highest is the Flex 4 Cookbook: Real-world recipes for developing Rich Internet Applications (Oreilly Cookbooks), based on recipies from the Adobe Developer Connection Cookbook site. Either of them would be great books for someone looking to come up to speed on Flex development.
There are 67 books available for Flex 3, which has been out for about 2 1/2 years. Flex 4 books are already nearly 1/3 of the way to that total, only 6 months into release.