There are 4 books in the The Edge series. The newest book is Steel's Edge which came out in 2012.

1
On the Edge

Book cover of On the Edge
Step into a whole new world in the first Novel of the Edge from the #1 New York Times bestselling author of the Kate Daniels series.

The Edge lies between worlds, on the border between the Broken, where people shop at Wal-Mart and magic is a fairy tale—and the Weird,…
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3
Fate's Edge

Book cover of Fate's Edge
Audrey Callahan left behind her life in the Edge, and she's determined to stay on the straight and narrow. But when her brother gets into hot water, the former thief takes on one last heist and finds herself matching wits with a jack of all trades...

Kaldar Mar-a gambler, lawyer,…

4
Steel's Edge

Book cover of Steel's Edge
The Edge lies between worlds, on the border between the Broken, where people shop at Wal-Mart and magic is a fairy tale—and the Weird, where blueblood aristocrats rule, changelings roam, and the strength of your magic can change your destiny…

Charlotte de Ney is as noble as they come, a…