Janet Evanovich's Stephanie Plum Series. Starts with "One for the Money" and each book is numbered similarly up to the latest "Fearless Fourteen". They are quick, light reads that will literally make you laugh out loud. My DH doesn't read books for leasure so he always looks at me funny when I'm reading a Janet Evanovich book and just bust out laughing.

I also liked Pillars of the Earth. I can't remember who wrote it but it is a pretty long book that isn't too deep but also not complete fluff. It was on Oprah's book club list.

Other than those two I love anything written by Harlan Coben if you like mystery. They aren't horror or scary, just suspensful.