Just quote a couple of spoiler-free sentences the book you’re reading to tempt other readers.
Here is mine:-
“There was a sudden twittering in the ivy overhead and a little bird, pushed out of its nest into the cold night air, came fluttering down, and flew against the lighted panes. In an instant, his dog, which had been uneasy at my vicinity before, stood baying in the window, and I only had time to escape and hide myself among the shrubs when he opened it, and stepped out upon the terrace.”
From The Haunted House by Charles Dickens.
It’s a short portmanteau novel, originally published for Christmas 1963 and recently reissured by the wonderful Hesperus Press.