If I'd known about I'd have mentioned it, but I didn't know.

The other day I wrote a Bleader post that said a few warm words about Tribune feature writer Christopher Borrelli. I promptly heard from Agate Publishing's Doug Seibold, letting me know his Agate Digital imprint brought out an e-book this April that collects many of Borrelli's best Tribune stories. Agate and the Tribune have partnered up to produce e-books from Tribune content, and Borrelli's Artists, Obsessives and Chicago Originals is the 48th from Agate Digital in the past year and a half.

Seibold tells me Evanston-based Agate, which he launched ten years ago, has just expanded the Tribune collaboration to include print titles; the first of those will appear in September.