History Lesson is a Star Trek: The Next Generation comic, the first issue of IDW Publishing's The Space Between miniseries, and the first ever Star Trek comic published by IDW. The comic was written by David Tischman with art by Casey Maloney, and was initially released in January 2007, with a reprint in the omnibus of the series in September of the same year. The story, set in 2364, features the USS Enterprise-D visiting the planet Tigan, where the crew find themselves involved in a political and technological conspiracy that has seen Tigan history continually rewritten.

The USS Enterprise-D over Tigan, a traditionally isolationist world, Captain Jean-Luc Picard talks with the Tigan Chancellor, thanking him for the opportunity for contact. Commander Riker selects Data and Tasha Yar for the away team to the planet.

On the bridge Geordi La Forge detects a brief energy pulse from the planet. Awaiting their escort Picard fills in the away team on the unidentified energy readings, warning them to stay alert. They are met by Edic, who leads them to meet the Tigan Chancellor. En route Edic explains the Tigans impressive power facility, the gravimatrix, and about the Tigan neurological communications system which downloads information straight to the Tigans cerebral cortexes via minute tachyon bursts.

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5 May

• LD reference: The Art of Star Trek: Lower Decks (hardcover)

27 May

• SA - Lost Contact comic: "Issue 2"
• ST comic: "Celebrations" variant foil edition

29 May

• LD comic: "Lower Decks, Issue 1", IDW Classics edition

May 1976 releases

• Gold Key TOS comic #37: "The Ghost Planet" (reprint of Issue 5) is released.
  • Captain Kirk and Mr. Spock save a planet from extinction, but are doomed by its war-mad leaders!
• TOS comics: "Day of the Inquisitors" and "The Cosmic Cavemen" are released in Spanish.

May 1996 releases

• TOS novel #78: The Rings of Tautee , by Dean Wesley Smith and Kristine Kathryn Rusch
• TNG novel #40: Possession, by J.M. Dillard and Kathleen O'Malley
• TNG novelization: Klingon, by Dean Wesley Smith and Kristine Kathryn Rusch
• ST reference: Federation Passport, by J.M. Dillard

May 2001 releases

• DS9 novel: Avatar, Book One, by SD Perry
• DS9 novel: Avatar, Book Two, by SD Perry
• SNW anthology: Strange New Worlds IV, edited by Dean Wesley Smith with John J. Ordover and Paula M. Block
• VOY comic: Planet Killer, Part 3: Death, by Kristine Kathryn Rusch & Dean Wesley Smith

May 2006 releases

• ENT novel: Last Full Measure, by Andy Mangels and Michael A. Martin
• SCE eBook #64: What's Past, Book Four: Distant Early Warning, by Dayton Ward and Kevin Dilmore.