I don't think I ever really used this book

Commodore 64 Adventures: A Guide To Playing And Writing Adventures - Mike Grace

I quite like going through these old books of mine because not only does it take me back to the good old days of the Commodore 64, but it also means that I can put screen shots of some of my favourite games on my commentary such as this:

 

 

which is actually this game:

 

 

or this:

 

 

which is actually this game:

 

 

(by the way, that is a cover from a cassette version – games used to come on audio cassettes, which look like this):