“ He was the author of The Story of Hysmine and Hysminias, in eleven books, a tedious and inferior imitation of the Cleitophon and Leucippe of Achilles Tatius. There is nothing original in the plot, and the work is tasteless and often coarse. ”

“ The style is remarkable for the absence of hiatus and an extremely laboured use of antithesis. The digressions on works of art, apparently the result of personal observation, are the best part of the work. A collection of eleven Riddles, of which solutions were written by the grammarian Manuel Holobolos, is also attributed to Eustathius.
The best edition of both romance and riddles is by I. Hilberg (1876, who fixes the date of Eustathius between 850 and 988) , with critical apparatus and prolegomena, including the solutions ”