There are 2 books in the The Shambling Guides series. The newest book is Ghost Train to New Orleans which came out in 2014.

1
The Shambling Guide to New York City

Book cover of The Shambling Guide to New York City
A travel writer takes a job with a shady publishing company in New York, only to find that she must write a guide to the city -- for the undead!

Because of the disaster that was her last job, Zoe is searching for a fresh start as a travel book…
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2
Ghost Train to New Orleans

Book cover of Ghost Train to New Orleans
COULD YOU FIND A MUSEUM FOR A MONSTER?OR A JAZZ BAR FOR A JABBERWOCK?

Zoe Norris writes travel guides for the undead. And she's good at it too -- her new-found ability to talk to cities seems to help. After the success of The Sbambling Guide to New York City,…