It's a book from the JSF creators, at Sun Microsystems yet!
I recommend you do a search on Amazon or other online stores of your choice and read the comments about the books you encounter. Pay attention to the ones with the greatest number of positive feedback, that may be a good indication of what's a good acquisition. People who have read through the books will give detailed information about its quality.
Regards from Brazil!
DJ aspirant, Engineering undergraduate, Tokusatsus addicted, fond of English language and Asia's, Buddhist, blogger, etc. I'll need to insert all these attributes in a Java class and manage to create methods for handling my overwhelming life