It's my first picture book! Published by Tugboat Press! Here's a synopsis from their website:

"My Brother the Dragon is a story of two young siblings, a little brother who is obsessed with all things dragon related (dragon toothbrush, draong underwear, dragon costumes, so many dragon toys) and an older sister who's had it up to here with all this dragon nonsense! Told in charming rhymes by Galen Longstreth and illustrated in full color with energy and humor by Jonathan Hill, My Brother the Dragon is a fun take of sibling rivalries, childhood obsessions, and the little things that drive us crazy about the people we love." 

You can purchase copies directly from me at my store, from Tugboat Press, or even Powell's

Here are some samples pages: