I knew that book would come in handy some day! Thankfully, I had the wit and foresight to stow it somewhere safe.
Don't worry, it's in a place that nobody could ever hope to find it! I needed a gyrocopter just to get there the first time. Unfortunately I crashed it on the beach on my way back. It was through that accident that I gained these super-gnomish psychic powers!
Look for my crashed gyrocopter somewhere on Land's End Beach and swim south from there! You'll know the spot when you see it!