Who's Who The Definitive Directory of the DC Universe (DC, 1985)
Written primarily by Len Wein and Marv Wolfman (with research by E. Nelson Bridwell and others), Who's Who is a meticulously detailed, alphabetically arranged series of reference volumes that provides personal data, history, and powers and weapons for countless DC characters, both popular and obscure, both new (circa mid 1980s) and old.
18 issues of 26 in the series.
