- Script
- Gerry Conway (credited)
- Pencils
- Dick Dillin (credited)
- Inks
- Frank McLaughlin (credited)
- Colors
- Adrienne Roy (credited)
- Letters
- Ben Oda (credited)
- Job Number
- S-2970
- Genre
- superhero
- Characters
- Justice League of America [The Atom [Ray Palmer]; Batman [Bruce Wayne]; Black Canary [Dinah Lance]; Green Arrow [Oliver Queen]; Red Tornado [John Smith]; Elongated Man [Ralph Dibny]; Wonder Woman [Diana Prince]; Green Lantern [Hal Jordan]; Superman [Clark Kent; Kal-El]; The Flash [Barry Allen]; Hawkman [Katar Hol]; Aquaman [Arthur Curry]; Hawkgirl [Shayera Hol]; Zatanna (joins)]; The Warlock of Ys; The Druid (flashback); Zatara
- Synopsis
- The members of the League are shocked when Zatanna refuses to join, but they eventually deduce that she was leaving them clues to discover that the Warlock of Ys was masquerading as Green Lantern.
- Reprints
According to Julius Schwartz's editorial records (supplied by DC Comics), this story was originally 25 pages and was cut to 22 pages before publication.
- Script
- Bob Rozakis
- Pencils
- ? (logo illustration)
- Inks
- ? (logo illustration)
- Colors
- ? (logo illustration)
- Letters
- typeset
- Job Number
- #S-3016
Letters of comment from Stephen Setter, Barbara Reader, Mike Christiansen, and Mike White.