The Crying Blades (Volume 1) is an OSR Role Playing Game manual, with complete rules for character generation, four classic classes (fighter, cleric, sorcerer, rogue), rules for actions and combat, and spells for Level one characters. The book gives you everything you need to get started, and the collection continues with Volume 2: Sorcery & Blessings, full of spells for sorcerers and clerics.
Note: this is an updated version of the manual, fully edited and revised (as of December 2022). The game is no longer in Beta version, this is the final version.