I started this one on my couch. As the weather warmed up, I took advantage of having a day off work to finish it outside, and no one but my son saw my tears at the end. 
 I found it difficult to put down, but if you have a bit of time, you won't need to do so. Just go all the way through, enjoying the drawings that perfectly illustrate the anguish of David Smith, the main character. He experiences the highest highs and the lowest lows, and McCloud knows how to execute this both pictorially and through text, and the more challenging part, the marriage of the two. 
 David has made a deal with the devil, granting him the power to create any art imaginable with his hands, but only for 200 days. A lot happens in that time, and I was completely sucked in. The ending is indeed sad, but satisfying.