Comic Title: Justice League of America #27
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: May 1964
On Sale Date: March 12, 1964 Newsstand Date March 12, 1964
Source: House Ad, Flash #144, Page 29

Copyright Date March 12, 1964
Source: Library of Congress, Periodicals 1964

Frequency: Monthly, with the exception of Jan., April, July and Oct.
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "The 'I' Who Defeated the Justice League"
Pages: 25

Feature(s):
Justice League of America (of Earth-1)

Writer: Gardner F. Fox
Penciller: Mike Sekowsky
Inker: Bernard Sachs

Reprinted In:
Justice League of America Archives Vol. 4 HC (1998)
Showcase Presents:Justice League of America Vol. 2 TPB (2007)
Justice League of America Omnibus Vol. 1 HC (2014)
Justice League of America:The Silver Age Vol. 3 TPB (2017)

Feature Character(s)

• Justice League of America (last appearance in Justice League of America #26; next appearance in Green Lantern #29)
• Superman (last appearance in Superman's Pal, Jimmy Olsen #76; next appearance in Green Lantern #29)
• Batman (last appearance in Batman #163; next appearance in Green Lantern #29)
• Flash (last appearance in Flash #144; next appearance in Green Lantern #29)
• Wonder Woman (last appearance in Wonder Woman #145; next appearance in Wonder Woman #146)
• Green Lantern (last appearance in Green Lantern #28; next appearance in Green Lantern #29)
• Martian Manhunter (last appearance in Detective Comics #326; next appearance in House of Mystery #143)
• Aquaman (last appearance in Aquaman #15; next appearance in Green Lantern #29)
• Green Arrow (last appearance in World's Finest Comics #140; next appearance in Justice League of America #28)
• Atom (last appearance in Brave and the Bold #53; next appearance in Atom #13)

Supporting Character(s)

• Snapper Carr (last appearance in Justice League of America #26; next appearance in Green Lantern #29)

Villain(s)

• "I" (an ultra-galactic energy-being; rendered inert in this story; no further appearances)
• Amazo (last appearance in Brave and the Bold #30; next appearance in Justice League of America #65)

Guest Appearance(s)

• Robin (last appearance in Batman #163; next appearance in Brave and the Bold #54)

Other Character(s)

• Jason Markham (a millionaire art collector; no further appearances)

Cameo Appearance(s)

• Doctor Light (in flashback to Justice League of America #12)

Comments:
This story makes reference to an untold adventure of Robin, "The Case of the Headless Statues."

J'onn J'onzz is the chairman of the JLA meeting in this story.

The Justice League monitors Green Lantern's battle with the Protonic Force in the second story of Green Lantern #29 following this story.

Synopsis:
The Justice League answers letters from Bruce Wayn, Ray Palmer, and C. King, unaware that these are actually the members not attending the meeting: Batman, Atom, and Aquaman. Moreover, the supposed letter-writers claim they never sent the appeals. Curious, Batman secretly joins the investigation of Flash, Green Arrow, and Snapper into a series of art gallery robberies; Atom accompanies Wonder Woman and J'onn J'onzz to the site of a cannon that somehow fires itself; and Superman and Green Lantern are joined by Aquaman as they try to solve the secret of a disappearing island.

Suddenly, the entire membership is captured by powerful tentacles and drawn through a space warp, where they confront a nameless "ultra-galactic" being, which calls itself "I." Having discovered that the actions of the League as a team are somehow draining its life-force, it created the fake letters to lure them into traps so as to capture them and remove their "success factor," thus preventing them from operating as a team.

Now able to succeed in their endeavors only as individual heroes, the heroes are on the verge of disbanding, when Snapper suggests that they reactivate Amazo, the android which possesses their combined powers. The energy released by Amazo, as he batters the heroes into submission, serves to destroy "I," and the JLA's "success factor" is restored, whereupon they defeat the android, and return to solve the cases they had been investigating.