I have my personal favorites, but if you are looking for lighter reads, I have the PERFECT books for you!
The Shopaholic series by Sophie Kinsella (and before you say anything, the movie was TERRIBLE and NOTHING LIKE THE BOOKS. NOTHING. I promise.)
They are "Confessions of a Shopaholic," "Shopaholic [something] New York (or Big Apple, I forget...it's been a little while)," "Shopaholic Ties the Knot," "Shopaholic and Sister," and "Shopaholic and Baby."
The reason I say buy them is because (at least I have) you will read them over and over...they are seriously laugh out loud funny, time and time again. Like, hilarious. And I have nothing in common with the books...I could care less about shopping, fashion, etc...but I just though they were absolutely hilarious books.
(Also, if you're willing to get into a deeper story, the Dark Tower series by Stephen King (7 books in all) has it all...love, romance, adventure, intrigue, drama, friendship, excitement, sci-fi...everything, and it keeps you hanging until the last words of the last book.)
(Also, I recommend anything by Lincoln Child, Douglas Preston, or anything they've written together.)