The Portable Door — Tom Holt

THE PORTABLE DOOR is the first novel set in the magical offices of J. W. Wells. Now a majorly fantastical movie starring Sam Neill, Christoph Waltz, and Miranda Otto.
 
“Tom Holt may be the most imaginative satirist to land on our shores since Douglas Adams.” -- Christopher Moore, New York Times bestselling author
 
Starting a new job is always stressful (especially when you don't want one), but when Paul Carpenter arrives at the office of J. W. Wells he has no idea what trouble lies in store. He is about to discover that the apparently respectable establishment now paying his salary is a front for a deeply sinister organization. It seems that half the time his bosses are away with the fairies. But they're not, of course.

They're away with the goblins.

The J.W. Wells & Co. Series:
The Portable Door
In Your Dreams
Earth, Air, Fire and Custard
You Don't Have to Be Evil to Work Here, But It Helps
The Better Mousetrap
May Contain Traces of Magic

Other titles from Tom Holt:
Doughnut
When It's A Jar
The Outsorcerer's Apprentice
The Good, the Bad and the Smug
The Management Style of the Supreme Beings
An Orc on the Wild Side

Holt Writing as K. J. Parker:
Sixteen Ways to Defend a Walled City
How To Rule An Empire and Get Away With It
A Practical Guide to Conquering the World