I have lots too, particularly detective/mystery ones like Agatha Christie, Erle Stanley Gardner, S.S. Van Dine, Ed McBain, Jeffrey Deaver, Michael Connelly, Douglas Preston and Lincoln Child, Matthew Reilly, Patricia Cornwell, etc..I stopped reading Cornwell's books after Black Notice though.
Of the romantic novels I like the works of Barbara Cartland, Nicholas Sparks, Janet Dailey.

My favorite author is Agatha Christie. I've probably read 80% of the books she wrote and it's hard now to find those that I haven't read. That's mostly because some publisher retitle the books under different names, but also because she wrote so darn many novels that it's hard to remember them all

I got a set of 5 DVD's of MGM 1960's Agatha Christie movies with Jane Marple as the detective last year (in Black and White). There's a trailer on the DVD's for 'And Then There Were None' which was originally titled 'Ten Little Indians'. That is absolutely the best Agatha Christie novel adaptation to movie, and is full of suspense. I hope it comes out in a set soon.

Wow 80%? I only have 29 paperbacks of Christie's novels. I wish I could also find more. Recently, I asked my husband to buy for me in Barnes. Most of my finds are in our thrift stores. I've never read any of Ariadne Oliver and Harley Quin mysteries.

Hmmm...I see new authors I need to check out. LOL I love reading when I have the time for it.

Have you tried a used book store or even there is one online called thebookcart.com they usually have lots of Agatha Christie books. I have never read any of hers.