THE DC COMICS ENCYCLOPEDIA 4TH EDITION (DK)
The encylopedias are released every four years. Every one so far has contained errors, but this 4th volume contains the most Legion-related mistakes. The entry on Cosmic Boy features an image of Lightning Lad instead. The group shot of the Legion (the 2020 version) names the female X-Ray Girl as Chemical King. There are two different entries for Matter-Eater Lad, none of which is the current iteration. Throughout, there is a mish mash of Legion characters from throughout various continuities, all of which would just confuse any newbie who wanted to actually use this as a reference book.