First published in English as "The Horn Book: A Girl's Guide to the Knowledge of Good and Evil - or modern studies in the science of stroking", is as the title may suggest, a nineteenth century sex manual for young inexperienced ladies that not only provides the descriptive instruction to 63 unique sexual positions, but also describes various techniques on tribadism, advanced methods for the onanist and lessons in the prevention of fecundation.Based on the French publication of "Instruction libertine, ou Dialogues entre Charles et Justine sur la theorie physique de l'amour et les diverses manieres de s'en procurer les plaisirs materiels" -This edition is as the original unabridged translation and provides an erotic, entertaining and educating read.