Really excellent hexcrawl module, within a dark, evocative setting drawing inspiration from Lovecraft and pulp science fiction rather than Tolkien. If you consider yourself a fantasy and/or RPG connoisseur, buy this for the read alone!
Great resource! And I don't need to study the book before using it - as long as I've flicked through it before a session, I have plenty of tables and inspiration for any city adventure. Highly recommended.