Furfural
Compound Interest: Everyday Explorations of the Chemical Compounds provides this infographic about the smell of books, and a full discussion, with references, of what’s going on when books release their odors. This subject constantly fascinates me. Previous posts are Smell of a book and Smell of a book, 2.
Making Book 
[…] I’ve gone on about this topic quite a lot. It’s a hobby horse of mine. See also Why old books smell, The smell of a book, Smell of a book 2, Smell of a book — graphic, […]