If you want just a quick read, nothing too deep, you can't beat the
Sue Grafton aphabet series. You can skip around from letter to letter and not get lost.
I have read the whole series and enjoyed them all.
Kinsey Milhone thinks it will be a cinch to find wealthy, missing Elaine Bolt. Elaine's estranged sister needs her missing sibling to sign a legal document. Apparently Elaine has already left Santa Teresa for her yearly trip to Boca Raton. An odd houseguest there swears Elaine arrived and is off traveling. But if so, why hasn't anyone heard from her in several months?
An early book in Grafton's alphabet series - her usual fine writing, and her quirky but lovable detective, Kinsey Millhone - but there were lots of loose threads left hanging at the end, and the ending itself wasn't as satisfying as some I've read of hers.