Coming in at about 250 A5 pages, all in black and white with all the fancy editing you could expect from microsoft word 98 edition, this book wastes no paper nor ink. It is extremely concise and every single word is vital for understanding.
As a student, I find this infuriating. While the mathematics is very simple, it features only sums and simple calculus, Gibbons has a habit of doing three or four mathematical operations in one go, without informing us lowly mortals as to why or what, so in many examples you'll find yourself scratching your head trying to reverse engineer the process he used to get from A to B. Game theory is a subject where you juggle lots and lots of variables at once, so when you add the above confusion it can feel like banging your head against the wall sometimes.
This book in many ways has more in common with a formula collection than a textbook, and as such I cannot recommend it to anyone who's new to the subject of game theory.