Adding on to this, the Harrow County omnibuses are a great deal (each containing 16 issues for $9) if you like mysteries with a touch of horror. Plus, I love the whimsical watercolors of Tyler Crook's art and try to read anything he's worked on.

That being said, you can read the entire thing for free if you're a Comixology Unlimited subscriber and go through the smaller TPB volumes. (Note: that link also shows the spin-off series, Tales From Harrow County, volumes 2 and 3 of which aren't part of CU).