I think I'll put The Mist immediately before Song of Susannah (since I understand that the setting of The Mist, Bridgton, Maine, shows up in SoS).
As I waited for people to reply, I started doing some additional research, and am now trying to decide whether or not to add the following novels to my reading list:
Joe Hill's NOS4A2
The Long Walk
Thoughts on adding them?
What about suggestions for where they would best fit if I DID add them?