The last book I finished was Cryptonomicon by Neal Stephenson. He used a lot of words I didn’t recognize or that I couldn’t clearly define, so I wrote them down to look them up.
Qwghlm
Modus vivendi
Fewfawfry
Eutropian
Vickers
Slumgullion
Kinakuta
Frisson
Encomium
Lissome
Sui generis
Spall
Palimony
Obloquy
Clostridium
Atabrine
Revetment
Anechoic
Xeriscape
Yasukuni
Caesura
Gracile
Epistemological
Calamansi
Nice collection! I keep meaning to do the same thing from Ghormenghast. There were hundreds of words over the three books that just boggled me.