Great news, Captives issue 1 is available on Comixology now
Click this link here if you want to have a copy of Captives you can read with their patented guided view that brings you from panel to panel!
In the future I'll likely start using Comixology as my main source for digital comics, but for the moment I'll still be offering DRM free PDF's for a little while longer so get them while you still can!