Obsidian Moon Crate features an exclusive Young Adult or Adult dark fantasy or sci-fi hardcover book(either signed, or with a signed bookplate), a crystal, an 8oz woodwick candle, and 4-5 other high quality items. Quarterly subscribers are billed the month before we ship, with the exception of any special edition boxes which are not included in subscriptions. OMC boxes are curated for every March, June, September, and December.