This radical and progressive sex manual was the first book to specify methods of contraception, including the sponge, condoms, and withdrawal. It also took the position, radical at the time, that with respect to sexual desire both sexes may be considered equal. Digital facsimile of the London, 1828 edition from the London School of Economics and Political Science at this link. A very well edited modern edition, with a full discussion of the publishing history of the work is What is love? Richard Carlile's philosophy of sex by M. L. Bush (London: Verso, 1998). A preliminary version first appeared in Carlile's The Republican, 11, 545-69 (May 6, 1825).