There are 7 titles associated with this person.

Thicknesse, Ann. Sketches of the lives and writings of the ladies of France. By Ann Thicknesse. London: James Dodsley, William Brown, 1780.
Thicknesse, Ann. The school for fashion, in two volumes. By Mrs. Thicknesse. London: John Debrett [179 Piccadilly], Samuel William Fores [50 Piccadilly], 1800.