Jeffrey Cohen
Aaron Tucker, a former investigative reporter and aspiring screenwriter, in New Jersey:

For Whom the Minivan Rolls (2002)

A Farewell to Legs (2003)

As Dog Is My Witness (2005)

Elliot Freed, recently divorced writer and proprietor of an old movie theater, in New Jersey, in the Double Feature mysteries:

Some Like It Hot-Buttered (2007) [review]
Finalist 2008 Lefty Award

It Happened One Knife (2008)
Finalist 2009 Lefty Award

A Night at the Operation (2009)

Written as E.J. Copperman

Alison Kerby, a guesthouse owner with two unexpected guests (ghosts) in her newly acquired Jersey Shore Victorian, in the Haunted Guesthouse mysteries:

Night of the Living Deed (2010)

An Uninvited Ghost (2011)

Old Haunts (2012)

Chance of a Ghost (2013)

The Thrill of the Haunt (2013)

Inspector Specter (2014)

Ghost in the Wind (2015)

Spouse on Haunted Hill (2016)

Samuel Hoenig, who answers questions for a living, in New Jersey, in the Asperger’s mysteries:

The Question of the Missing Head (2014)

The Question of the Unfamiliar Husband (2015)

The Question of the Felonious Friend (2016)

Rachel Goldman, author of a series featuring missing persons investigator Duffy Madison, in the Mysterious Detective series:

Written Off (2016)

Edited Out (due May 16, 2017)