[Pulpmeister]

The third and fourth of my last batch:

3: Bonjour Tristesse. (I thought of including the whole opening para which has "sorrow" in it about six times, a translation of "tristesse" from the French, but thought one was enough. I don't read French but it would be interesting to know what the original French looked like. Lots of tristesses, I guess.)
4: Glitz, Elmore Leonard

The Agatha Christie was from Appointment With Death, 1938.

The opening lines I collect are ones that stick in my mid as "sucking me into the book" rather than spitting me out.

afterthought: found the opening para online:

Sur ce sentiment inconnu dont l'ennui, la douceur m'obsèdent, j'hésite à apposer le nom, le beau nom grave de tristesse. C'est un sentiment si complet, si égoïste que j'en ai presque honte alors que la tristesse m'a toujours paru honorable. Je ne la connaissais pas, elle, mais l'ennui, le regret, plus rarement le remords. Aujourd'hui, quelque chose se replie sur moi comme une soie, énervante et douce, et me sépare des autres.