Speaking of Yves Klein’s Leap into the Void (1960), Declaring Space: Mark Rothko, Barnett Newman, Lucio Fontana, Yves Klein by Michael Auping might also be a good book to look at. It's small (as in, it isn't too intimidating), but very much on point for anybody who's actively thinking about space, void, etc. in their work.
Here goes a link to my work. I'd appreciate any feedback, blunt or not blunt.