Lion History Series (10 vols.) is still Gathering Interest. I ordered it over 2 years ago; it's the longest standing pre-pub I'm still waiting on. I own three of these books in paperback, and would love to have the whole series in Logos format. I'd like to put in a plug for it.
These are easy to read introductory books on various chapters in the history of Christianity. In addition to the main narrative, they are chock full of interesting sidebars, maps, and art. I expect Logos would plan to keep all the art since it's such an integral part of these books. Each volume includes a chronology of the period at the end.
You can see limited previews of some of the volumes on Google Books (no images, though):
I can show you one of the color reproductions from Faith in the Medieval World, since I found it already elsewhere online. Just to give you an idea of some of what you can expect inside along with the text (nearly every page has something of this quality):
