The first book in the Delta series (a Titan spinoff!) is on sale at iBooks for $0.99 right now!
iBooks US: http://bit.ly/1xp6OnT
iBooks UK: http://bit.ly/1B1e0xK
iBooks AU: http://bit.ly/1FVTB07
And find out more about Delta: Revenge soon! (oh, it’s on pre-order at iBooks! look at that!)