Other Legacy Girl Media
Books
Legacy Girl: Phonics Fun: a book intended to teach phonics to young kids. Released in 2011.
Ace Academy: a series of middle grade books released in 2013. Turns Cover Comix's heroes into high schoolers. The main characters are Ray Ace and his siblings, but Legacy Girl shows up as a side character.
A History of Legacy Girl: released for Legacy Girl's 50th anniversary in 1993. Self explanatory title.
Legacy Adventures: a series of graphic novels focused on younger versions of Legacy Girl, Legacy Lass, and a new Legacy character: Legacy Boy. It's aimed at younger readers - elementary and middle-school range. Released in 2010.
Appearances in Other Cover Comix Media
Legacy Girl has shown up in several other Legacy Comics and Cover Comix stories, most notably in Legacy Comics's Crossover Window run of issues in which every Legacy Comics hero must team up to defeat the Great Storm Triad.
Legacy Girl has teamed up with Cover Comix fan favorite hero Fox Sparrow - Juliana Caballero - in one issue, Fox Sparrow Fighter #56.