This isn't really a work of fiction as much as it is a grab bag of riddles, at least 30, mostly built on wordplay. You type a number to go to that riddle and try to solve it, if you do you get that keyword (the answer to the riddle) in your magic book. When you decide to fight the final boss you use the words in your book to attack and defend. Sometimes your companion will prompt you to use a certain kind of word (repeated letters, alternating consonants and vowels, pronounced two different ways). Once a word is used it disappears from your book and you can't use it again.
The boss fight was the fun part, the individual riddles were the hard part. Perhaps that is an indictment of me and my poor wordplay skills, but I think I only got about 15 or so on my own, then used the walkthrough to get 5 more before getting tired and frustrated and skipping to the boss fight. Some of the solutions to the riddles seem unfair to me, as in I can't imagine how I would have ever gotten there without the hints. Others are fairly easy, but fun, and some are clever and satisfying. In the end though, it didn't really grab me and hold my attention. Your mileage may vary.
One of the best games I've ever played. It was fun, a good length without overstaying its welcome, light-hearted and humorous while still being challenging. Loved how it seemed like a goofy game at first, but then you discovered there was more to the story than it first appeared. The interaction between the characters, and how you could switch which one you were "controlling" was clever and I loved how the limited verb set didn't feel too easy.
One of the few IF games that I know I'll play-through again for the shear enjoyment of it.
ADDENDUM: As of the 10/01/20 this is still my favorite IF piece of all time.
Forgive me, it has been several months between playing this game and writing this review so I can't remember all the details, but what has stuck with me is that I didn't care for it much. The fact that (Spoiler - click to show)the game starts in one place and then you never go back there, and instead are playing somewhere completely different threw me for a loop. I didn't think that the puzzles were set up well (I had to cheat several times and when I found out the answer to several problems I knew that I was unlikely to have ever figured those out on my own because they didn't really make sense). I also think that some of the characters' abilities should have worked in ways that the game didn't allow only because that wasn't the right answer. My favorite part was the ability to switch between phone lines to control the different characters. Clever and decent effort in the classic style, but in the end just not for me.