The small pocket book edition of Spinoza's Ethica contains the Latin original and the French translation of the Ethica. I do not read Latin nor am I an expert on Spinoza or his Ethicha but the French translation helps me to put other translations in, e.g., Dutch and English, in perspective. The booklet contains a bonus dossier with translations of the descriptions of the live of Spinoza by Jean Colerus and Doctor Lucas as well as the inventory of his estate such as it was when Spinoza died. The pocket book therefore offers a lot, yet it is is probably the cheapest translation of the Ethica available. Do not be misled by the price of the book, its quality is outstanding.