Carriers (Carriers #1)

Fable, Gladius, Cherrybomb, Dark Dove: no one has heard of these brave heroes yet but they are the only thing standing between the citizens of New York and the unseen terrors that lurk all around them. A band of weaponized carrier pigeons, they soar the night sky looking for new threats and find their largest one yet when the Croc King comes climbing up out of the New York sewer!