I googled and there are a couple of sites which dated it to 1800, but they literally just give the title, publisher and date and no more information.

There is a bit of info about the publisher:

COOKE, Charles, bookseller, 17, Paternoster Row 1789L-1817U. Livery Sta. Co. by 1792. Common councillor Farringdon ward within 1805-16. Son and successor of John Cooke q.v. Began to publ. series of 12mo classics neatly embellished by engravings c1793.

Cook, Charles. Died [16 Apr] in Paternoster-row, Charles Cook, Esq., many years an eminent bookseller, and one of the Common Council for his ward. He had a few days previously undergone the operation for the removal of a stone in the bladder. In 1809, he succeeded to the property of his fathr, the late John Cook, amounting to above 50,000l. acquired in the same trade (GM Apr 1816, 382; MM May 1816, 369).

Can't find any info to estimate its worth though.

Someone else will be along who knows more.