I found this game after a review of cooperative deck-building card games. My only previous experience with such is: Harry Potter-Hogwarts Battle, which my family and I also love.
The cards and board artwork really is beautiful, but I would say the actual gameplay is my favourite feature. The 6 rounds move along at a steady pace, and you never quite catch your breath as you continue defeating curses, while trading spells and element cards, all while inevitably going a little bit (but hopefully not completely!) mad. Having 8 unique characters in a 2-5 player game, plus the extra spells, curses and Monsters means we have yet to face the exact same Big Book of Madness game twice.