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Les Habitants du Ciel: Atlas Cosmique de Valérian et Laureline (literally "
The Inhabitants of the Sky: The Cosmic Atlas of Valerian and Laureline") () is an illustrated
encyclopedia that gives further background detail to the many alien creatures Valérian and Laureline have encountered in their travels, first released in 1991 by parent publisher
Dargaud. It has seen several translations into other languages as well, including a 2017 one in English by
Titan Books as
Valerian: The Illustrated Treasury (), but adhering to the format set by Cinebook for its hardcover collection. •
Les Extras de Mézières ("''Mézières' Extras''") () compiles various miscellaneous Valérian related works including stamps, murals, images from the pilot episode of the proposed animated series in 1991 and Laureline's
Playboy spread as well as other non-Valérian related artwork. •
Les Extras de Mézières No.2 (Mon Cinquieme Element) ("''Mézières' Extras No.2 (My Fifth Element)
") () primarily covers the work Mézières did on the 1997 Luc Besson film The Fifth Element'' but does also show where that film was influenced by the Valérian albums. Like the first outing, it is primarily an art book and neither has therefore seen any translated editions as of 2019. ==References==