I can't remember how I found Daniel Milnor's website, but he's fun to follow. A self-described recovering photographer who's the creative evangelist for Blurb, which specializes in DIY photobooks. (I met Chuck on that site! Hi Chuck.)
He recently profiled Shannon Johnstone's book and work related to dogs, specifically shelter dogs. I think it's a great example of the long-term photo essay or photo narrative. That's got to be some of the most challenging and rewarding photo work out there. Commitment, discipline, patience, and access. (Note: Dan's site seems to be loading slowly tonight.)
I haven't watched all of the video (skimmed it), but I read the posted interview. If you like dogs (and if you don't, we know you're a space alien from the nefarious planet Felinus) or photography, have a look. A quick warning - the topic involves shelters, which means it touches on dogs who don't get adopted. It's been a rough year, so it's completely understandable if that's not something you want to think about today.