The Doorman Series by Eliot Rahal, Daniel Kibblesmith, Kendall Goode

On every planet there is a door that can take you anywhere in the galaxy. Henry Clay Waters is the Doorman for Earth - and he's one day from retirement... moreOn every planet there is a door that can take you anywhere in the galaxy. Henry Clay Waters is the Doorman for Earth - and he's one day from retirement. So why is he suddenly the target of Intergalactic assassins? Can spunky alien cop, Detective Flower, keep him alive long enough to find out? It's a cosmic comic caper full of space Koalas, monsters, exploding heads, and egomaniacal extraterrestrial gazillionaires, as two working-class heroes try to save The Universe in The Doorman! Reprints The Doorman #1-4, and includes 14 pages of bonus material! less