I only recently got in Transformers Animated because of a friend's pruding (and Prowl, good god, do I fangirl to Prowl, hence the icon), so I've been grabbing up merchandises of that durn show (Hasbro owns my sooooooulllll).
I recently picked out the second Allspark Alamanc (only because the first isn't available in a lot of online stores, though I did find one on Borders.com and am currently awaiting for that one to arrive at my doors) and I am blown away by it. I love art/behind-the-scene stuff. I thrive off of it. I am amazed at the content they added in the book. A two-page spread detailing Rodimus Prime's bio and character spread? He appeared, what, only a grand total of five minutes in the show? Profiles of characters that never made it into the show, but was added in the book to expand on the world? Amazing. I don't think I ever saw Botanica, but they put her in there and gave her two whole paragraphs! As well as detailed, head to toe shots of many of the characters, important items, vehicles, etc. that will keep my hands busy trying to draw them all, this is ridiculously chock full of goodies that I am crying in happy tears. I'm very pleased on how thorough the book is and the only thing I regret is that I didn't get into this show sooner.
Completely agreed on the meager section for Season Four, Hellcat. I really wished they went into deeper details (I am disappointed "Allspark-calyspe Now" will never be made because the potential idea of Prowl possessing Wreck-Gar - one of the 'bots powered by an Allspark fragment - would have been hilarious and awesome). I desperately cross my fingers for a comic continuation and this is coming from someone who doesn't have high expectations on anything.