This supplement provides us with Esoteric Experience and Mysterial Merits, both of which are great additions to both the setting and game system. If used sparing, it can help make the game slightly stranger, with rare anomalous characters that can add more flavour, mystery, and possibility, without needing to upstat the character. These mechanics also make keeping a character diary even more useful. Helpfully, Terry ends the book with some variants, designed to be even simpler. Whilst not an essential book, I’d highly recommend it for anyone wanting to add extra layers to their games.