Howell Corin : Mighty Morphin Power Rangers. Volume three / written by Kyle Higgins ; illustrated by Hendry Prasetya (chapters 9, 11-12), Jonathan Lam (chapter 10) ; colors by Matt Herms (chapers 9, 11-12), Joana Lafuente (chapter 10) ; letters by Ed Dukeshire.
Howell Dean : Little heroes / Oceanic Films ; written by Richard Preston, Jr., Thomas Garner [and] Brad J. Sergi ; produced by Jess Mancilla ; directed by Henri Charr.
Howell Keith : A Christmas carol : the graphic novel / Charles Dickens ; script adaptation, Sean Michael Wilson ; American English adaptation, Keith Howell ; [illustrated by Mike Collins ... [et al.]].
Howell L : World of plants / Laura Howell, Kirsteen Rogers and Corinne Henderson ; edited by Laura Howell.