The Lost Level by Brian Keene
I tore through this book this past weekend. It is that much fun!
Taking pages from various "lost world" stories, Keene rolls out his own take on the genre. With influences ranging from The Lost World by Arthur Conan Doyle, the Pellucidar series by Edgar Rice Burroughs, and up through the television series Land of the Lost and Lost, this story romps through dinosaurs, lizard men, killer robots, deadly vegetation and other dangers.
While the tropes are there (in a good way,) Keene also weaves in his own touches. There are some nice modern knuckle-down-and-do-it survivalist methodologies, which are often glossed over in such fiction. It adds veracity to the hero, Aaron Price. Keene's fiction is all connected and in this case, literally - there is a Labyrinth between worlds in time-space. Unfortunately, if travelers in the Labyrinth are not careful, they can wash up into the Lost Level - from which there is no return. Also making an appearance are the sinister Global Corporation, a shadowy conglomerate also present in some of Keene's other fiction.
The Lost Level is both homage and pastiche and makes no bones about it, wearing its influences proudly on its sleeve. It is pure Saturday matinee material in the best way. If you enjoy the lost world genre, you need this book!