Comic Title: Green Lantern #42
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: January 1966
On Sale Date: November 25, 1965 Copyright Date November 25, 1965
Source: Library of Congress, Periodicals 1965

Frequency: Monthly, with the exception of Feb., May, Aug. and Nov.
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "The Other Side of the World"
Pages: 24

Feature(s):
Green Lantern (Hal Jordan of Earth-1)

Writer: Gardner F. Fox
Penciller: Gil Kane
Inker: Sid Greene

Reprinted In:
Superman #272 (1974)
JLA:Zatanna's Search TPB (2004)
Green Lantern Archives Vol. 6 HC (2007)
Showcase Presents Green Lantern Vol. 3 TPB (2008)
Green Lantern Omnibus Vol. 2 HC (2012)
Green Lantern:The Silver Age Omnibus Vol. 2 HC (2018)
Green Lantern:The Silver Age Vol. 4 TPB (2019)

Feature Character(s)

• Green Lantern (last appearance in Justice League of America #41; next appearance in Flash #158)

Guest Star(s)

• Zatanna (last appearance in Atom #19; next appearance in Detective Comics #355)

Supporting Character(s)

• Tom Kalmaku (last appearance in Green Lantern #41; next appearance in Green Lantern #43)
• Carol Ferris (last appearance in Green Lantern #41; next appearance in Green Lantern #43)

Villain(s)

• Warlock of Ys (next appearance in Justice League of America #161)

Guest Appearance(s)

• Zatara (appears in flashback; last appearance in Atom #19; next appearance in Justice League of America #51)

Other Character(s)

• Residents of Ys (Sir Alain Barbetorte named; no further appearances)

Cameo Appearance(s)

• Hawkman (in flashback to the first story of Hawkman #4)
• Hawkgirl (in flashback to the first story of Hawkman #4)
• Atom (in flashback to Atom #19)
• The Druid (in flashback to Atom #19)

Synopsis:
When Green Lantern leaves to confront a pirate robber, he mysteriously speaks his oath backwards. He leaves the mystery unsolved and battles the pirate who possesses magic. Green Lantern's ring behaves oddly, even managing to affect yellow-colored objects.

Green Lantern follows his opponent to a mystic location that serves as the gateway to the world of Ys. There he is met by Zatanna who explains that she was responsible for the ring's odd behavior. The Warlock of Ys seeks to use GL's ring to enter Earth's dimension. Zatanna warns GL and together they enter Ys.

Green Lantern's ring and Zatanna's magic don't function normally in the alternate world. The Warlock tries to procure GL's ring, but the heroes learn their new limitations in time to thwart their foe. The Warlock then sends the inhabitants of Ys, former residents of Earth, to attack. GL overcomes them then confronts the Warlock.

The heroes are at a standoff with their opponent. Zatanna wishes to know what happened to her father, so GL offers the Warlock his ring in exchange for the information. Zatara was banished to Ys by the Druid, but he escaped with the Warlock's crystal ball. Once his tale is told, the Warlock attempts to use the ring. Zatanna has given it an order first, which paralyzes the villain. GL and Zatanna then return to Earth. Zatanna vows to continue her quest to find Zatara.