It's the long awaited update for one of the most popular SCEA book. At least reading from the product description, the content has been updated for the SCEA 5 exam (ie EJB 3).
But like what Cameron said, it should not be the only book/resource you'll ever read for SCEA. SCEA is a huge exam (wide and shallow as some would say). Checkout the SCEA links for a list of recommended resources.