Start with high-confidence living with hoarding books, then narrow by subgenre or adjacent topics.
The Secret Lives of Hoarders
Matt Paxton, Phaedra Hise
Stuff
Gail Steketee, Randy Frost
Keep the Memories, Lose the Stuff
Matt Paxton
How to Manage Your Home Without Losing Your Mind
Dana K. White, Thomas Nelson
Decluttering at the Speed of Life
Making Home Your Happy Place
Katy Wells
Nobody Wants Your Sh*t
Messie Condo
Unclutter Your Home
Donna Smallin, Donna Smallin Kuper
Beyond Tidy
Annmarie Brogan, Marie Limpert
The 5 Minute Clean Routine
Anna Louisa