Surfers of the Zuvuya: Tales of Interdimensional Travel by Jose A Arguelles claims to be a guide to interdimensional travel using Zuvuya - the Mayan memory circuit. According to the introduction:
"Zuvuya is the Mayan term for term for the big memory circuit... the memory hotline. It works individually and collectively. Most importantly, it connects equally to the future as well as the past. Why? Because Zuvuya is the interdimensional thread. And we are all interdimensional."
How weird and wonderful! I am not only looking forward to reading it, I am also delighted at getting a bargain. I paid 75p for this book, which would cost £7.99 new or £3.10 secondhand through Amazon.
Books I've picked up in a similar way in the past include a hardback copy of
Culpeper's Complete Herbal, which is useful for learning what the plants in my garden are good for, and Scottish Myths and Legends, which isn't valuable but I enjoyed reading. I would definitely recommend charity shops to any witch wanting to build up a useful library for very little money.