There are five books in the series, plus a prequel about Hammer, a Republic Commando that was briefly seen in Book 2. The first three cover the Republic Era, from 23 BBY - 19 BBY. The last two books cover the Imperial Era, from 0 ABY - 4 ABY. The series is followed by another, Star Wars: Generations.
Book 1: Tales of a Shiny (September-October 2012)
Book 2: Cover Fire (November-December 2012)
Book 3: Empire Rising (January-February 2013)
Book 4: Decisions (March-April 2013)
Book 5: Consequences (April-May 2013)
Hammer's Prequel: Dark Depths (June-August 2013)