A bunch of Howard Chaykin's collected stuff is on sale at ComiXology.
American Flagg!: The Definitive Collection is $7.99. Probably his best solo work, this collects the first twelve issues (the ones Chaykin wrote and drew himself).
Power and Glory is $4.99. A crime fighter is genetically engineered to be a super-hero - but when the test goes awry and he doesn't have the superhero qualities needed, he has to be teamed up with a former CIA agent who is the brains behind the duo. One gets all the glory while one has all the power.
Black Kiss is $5.99. Very controversial, Black Kiss is for adults only and is deliberately provocative and offensive. Created as a protest against a proposed rating system for comics.
The Art of Howard Chaykin is $7.99
Midnight of the Soul is $8.99. It's 1950, and Joel Breakstone, former GI and liberator of Auschwitz, is seriously damaged goods. He hasn't exhaled a sober breath in five years—until the sheltered life he's created for himself unravels and he begins the long night that will change his life forever.
The Shadow: Blood & Judgment is $6.99. In the 1980's, Chaykin revived The Shadow. The laugh had vanished...the mocking, sinister laugh that signaled doom for the petty souls whose wrongdoing stained the world. It was gone, lost in the night that echoed it. Now, one by one, his friends and operatives are being ruthlessly murdered. Someone is trying to draw him out. Thirty-five years later, it is time for him to return. The laugh is here again. The Shadow is back. God help the guilty.