Old Man's War by John Scalzi

Books Series in Progress:

The Dresden Files - Only one book behind.

Expeditionary Force - Caught up. Impatiently waiting for the next installment.

Murderbot Diaries - On Rogue Protocol.

Dungeon Crawler Carl - Just finished the first book.

Walt Longmire - I am so behind on these. I don't even know where I left off, but it is an unfinished series.

The Saint of Steel - Read Paladin's Grace, which is book one, recently.

And, now, I'm in the world of Old Man's War by John Scalzi.