Two critical companions, both bought at Half Price Books.
(Heinlein, Robert A.) J. Neil Schulman. The Robert Heinlein Interview and Other Heinleiniana. Pulpless.com, 1999. First edition trade paperback edition thus (there was a previous digital edition, but this is the first hardcopy version), a Near Fine- copy with creases to both rear corners. Long interview with Heinlein conducted in 1975, along with reviews of his works, letters, etc. I don’t think I’ve ever seen a copy of this before. Bought for $8.99.
(Pratchett, Terry) Burrows, Marc. The Magic of Terry Pratchett. White Owl, 2020. First edition hardback, a Fine copy in a Fine dust jacket. Critical companion to Pratchett’s works. Bought for $6.29.