The Bookshelf

Classical Dictionaries

• Dictionary of Greek and Roman Biography and Mythology by William Smith (1867) — three-volume, 3,700-page ocean of Greek and Roman historical, literary and mythological figures. 
• Dictionary of Greek and Roman Antiquities by William Smith (1870) — 1,300-page compendium of information on the classical world; excluding biography and geography
• Dictionary of Classical Antiquities by Oskar Seyffert (1894) — guide to the ancient world, with 716 pages, 2,630 entries and over 450 illustrations.
• Classical Gazetteer by William Hazlitt (1851) — a dictionary of some 14,000 ancient Greek and Roman places.

Other Works

• Greek Oligarchies: Their Character and Organisation by Leonard Whibley (1896) — still the only full-length examination of oligarchical government in Greece.
• Greek Biology and Medicine by Henry Osborn Taylor (1922) — short, engaging overview of Greek achievements in biology and medicine.
• English Translations from the Greek: A Bibliographical Summary by Finley M. K. Foster (1918) — alphabetical list of translations of Greek authors, from Caxton to the First World War.
• Manual of Greek Literature by Charles Anthon (1853) — survey of Greek literature and authors all the way to the fall of Constantinople; excellent coverage of obscure authors.

The "Lost Loebs"

• The Greek Anthology translated by W. R. Patton (1916) — volume 1, books 1-6 of the famous collection of short Greek verse.
• Lucian translated by A. M. Harmon (1921) — volume 3/8 of Lucian's works.

Other Translated Literature

• Geoponica ("Agricultural Pursuits") translated by Thomas Owen (1805–1806) — the only English translation of this engrossing Byzantine compilation of Greco-Roman agricultural lore.

Greek and Latin Language Study

• An English-Greek Lexicon by G. M. Edwards (1930) — indispensable aid to serious Greek prose composition. 

Special Topic: Greco-Roman Divination and Oracles

• Greek Divination by W. R. Halliday (1913) — the most recent general work on all types of Greek divination.
• Les Livres de Divination Traduits sur un Manuscrit Turc Inédit by Jean Nicolaides (1889) — French translation of Ottoman Turkish works of divination, most or all of which are translations of works in Greek, either extant or lost