There’s nothing like a quarantine at home to get you motivated to do some Spring cleaning! One book on this topic that I have found to be inspiring is Making Space, Clutter Free by Tracy McCubbin. I have read many books on this subject. What I like about this one is that McCubbin addresses the reasons behind why we clutter in the first place, both psychological and societal. She is also refreshingly honest about decluttering being a process rather than some magical, one-day affair.
Some other books that I have found to be helpful are:
The Clutter Cure by Judi Culbertson also addresses the root causes of clutter.
Essential: essays by The Minimalists by Joshua Fields Millburn and Ryan Nicodemus. This collection of short essays from their website, The Minimalists, is great for dipping in and out of. This one encompasses an entire lifestyle, including technological and financial clutter as well. Or, you can listen to their podcast about living a more meaningful life with less.
Soulful Simplicity by Courtney Carver. Like The Minimalists, Carver is advocating for simplifying your entire life so that you can focus on your personal priorities.