Maybe put them in front of a fan for a couple of days. I’d put a heavy book on top to keep them from getting wet hat “wind swept” look.

Huff enough rosin flux and you won’t mind the smell anymore.

jk the smell will probably go away on its own as the book airs out

Could be the gloss coat on the cover, spray a rag with Lysol or something similar and wipe them down.

If it’s INSIDE the books too, all you can do is fan them and air them out.