This is an interesting little book. Strange size (about 6" high and 9" long but 2" thick) but a cool book. It's very heavy (seems like the weight of a phone book)!! Basically it devotes 2 or 3 pages to each episode sometimes with a summery of the episode; other times with some behind the scenes information. It also has the appropriate corresponding photos (which look grand). Mostly screen caps but there are many behind the scenes photos and some photos that have not been seen before. Has some interesting tidbits like the doomsday machine was actually made by dipping a wind sock into concrete. The only bummer is that there are full page photos of the phaser 2, communicator and tricorder . . . . wait for it . . . . . yes, they are all fakes! Anyway well worth picking up.