The Colour of Magic is about a wizard, well, kind of a wizard, and the tourist he is in charge of, Twoflower and his Luggage.
Ricewind (the wizard) is not a full wizard as he got kicked out of the Unseen University for learning a Spell that should not be Spoken. It takes up all the spell space in his brain, and thus he couldn’t learn any more. But he still styles himself a wizard.
Twoflower is an Inn-Sewer-Ants (insurance) agent from another country/area of the Discworld (which is, in fact, a disk that rides on four elephants backs, which rides on a very large turtle, and there is an edge of the world to fall off of), who is travelling with his Luggage, made out of sapient pear wood, and has hundreds of little legs. The Luggage also has many teeth, a tongue and much gold. It will follow Twoflower where ever it goes!
Although I didn’t find it nearly as laugh-out-loud funny as I had thought it was, Pratchett did a very clever job of hiding his dry, English humour throughout the book. He kept it light by introducing characters such as Fate, Death, dragons that only exist if you believe in them, Hero’s that aren’t very smart, and people made out of water.
I would recommend this book to anyone. It’s a cleaner, more fantastical version of Monty Python. A quick read that will make you chuckle.