For a pocket reference, it's a great book. I would like a little more detail on each species on topics such as common issues/diseass but that would increase the form factor. The photos are clear and the information before and after the plant species section is helpful. It's hard to find a handy to use aquarium plant reference, so I can recommend this for planted tank enthusiasts.
Because Skyrim is so large and has so many locations, items and intersecting quests, I bought this to help when I wasn't sure what to do next. It's a great reference. Very comprehensive and detailed. It's handy to use instead of looking things up online.
My only issues are that I found it to be a challenge to find the specific quest you are looking for. There are so many and the book sorts it by type (ie. Companions, College of Mages, Daedric, etc.) The other minor issue is that I find the paper a bit on the flimsy side but since it's 650+ pages, I guess that could be expected.
Overall, a great reference and I would buy it again.
I think this book assumes that the reader knows about all the Star Wars worlds. As I read the book, I tried to find the referenced worlds in the corresponding maps. To say the least, it was difficult and a pain to try to do a search through a map that has so many labels on it. I would suggest that the authors italicize or bold the names of planets that are referenced int the text.
I own other Star Wars reference books and I would consider this one of the less appealing volumes. It's not terrible but not overly reader friendly.