This is a wonderful book full of artwork displaying all the set pieces and props.
Written from an in-universe perspective kind of like an "owners manual".
I love it.
If you are into some make-believe, this will be a fun book for you.
You find everything in there, from detailed descriptions and drawings of the hand phasers and rifles, overview of all main areas like the bridge and engineering, several pages of gorgeous artwork of inside and outside of the Delta Flyer, to the Doctor's mobile emitter.
If you are looking for a book describing the background and design of the series, then you are wrong, since this is more of a Starfleet handbook.