BookBrowser on Simon R Green's Nightside series
Sadly, BookBrowser doesn't seem to exist anymore - the website redirects to Barnes and Noble and I couldn't find the original review on the WayBack Machine, so here it is via the Amazon description:
"Cross The X-Files with The Twilight Zone, add a pinch of The Outer Limits and a dash of Eerie, Indiana, and one might have a glimmer of an idea what the Nightside is like." - BookBrowser
"Cross The X-Files with The Twilight Zone, add a pinch of The Outer Limits and a dash of Eerie, Indiana, and one might have a glimmer of an idea what the Nightside is like." - BookBrowser