Full of pictures, and "popup video" style tidbits about the characters, it is a quick, easy to absorb gallery of characters used in the JLA comic book series by DC.
What it lacks is the comprehensive info for the Justice League of America and its other incarnations, but then again, it was listed as JLA: the Ultimate Guide. Because of that it's great for what it's worth. The timeline does make a nice attempt to mention all of its past incarnations.
One thing... it keeps mentioning Triumph, but it didn't really show who this traitorous character is or looks like.
Despite the huge disappointment on my part, I still give the book 3 stars. It still has the brilliant presentation and younger readers will be less affected by the lack of history and acknowledgement of the previous leagues. I just don't understand why this book got only half the attention in comparison to the X-Men when it could have easily been filled out more. I would be interested in seeing a revision some day that gives the Justice League the attention they deserve.