Realised in print by Chris Farnell, the book is a weighty 175pages in paperback and you want to keep on turning them.
The text itself isn't a trawl to read and instead the necessities of the Cerritos are broken down into more manageable chunks coupled with the stunning animation from the show itself. It's also incredibly current with the lieutenant ranks of Boimler, Mariner, Tendi and Rutherford in place.
But what adds to this perhaps in a different way to the more "serious" technical manuals and other reference works is the asides (proof reader notes in-universe) from the crew. Adding a level of character to the handbook and keeping in line with the personalities of those characters at the same time!
In fact that's one of the big wins for me here. While there's a lot of suggestion and intimation it still leaves fans without 100% clarity and allows your imagination to fill in some of the blanks. Bits you might be able to join the dots thanks to episodes (certainly An Embarrassment of Dooplers) but in other instances it leaves a good amount of room for future developments. However, according to the author, the wonderfully UK-based Chris Farnell, the matter surrounding Admiral Jellico's circulatory system IS canon. Period. Fight him.
But that's not to say that the book ignores the canon of the show's episodes so far. Readers get nods to all types of stripy tricorder, the best holodeck programmes to run and even a Strange New Worlds homage with Cerritos bingo which might be a tad more extreme and expectedly curveball.
Indeed, Farnell might have been given the reins to do as he wished with the handbook but he's absolutely kept it under control and well within Star Trek specifications especially since it still had to get the seal of approval from The Top Man Mike McMahan before printing (as Chris noted to me during a brief chat!).
If you're expecting a detailed technical piece of literary wizardry a la the TNG Technical Manual then this isn't the book however if you are looking for something that acts as a side guide and extremely entertaining companion to Lower Decks then this will definitely hit the spot.