This expanded edition contains many new illustrations by Jean-Claude Mézières and new text by Pierre Christin.
From the publisher:
On the occasion of the 50th anniversary of this cult favorite, and the 2017 release of Luc Besson's movie adaptation, comes a new edition of Les habitants du ciel (The Inhabitants of Heaven), the out-of-print "cosmic atlas" of Valérian and Laureline. This expanded edition contains many new illustrations by Jean-Claude Mézières and new text by Pierre Christin. The different chapters are separated by short strips featuring our heroes. An entertaining reference to the world of Valérian.