The first book, My Sister's Keeper by Jodi Picoult, was very heavy, and I felt like I'd been dragged behind a truck by the time I finished it. It was a moral dilemma, and I knew which side I was on, but could sympathize at times with the other side. Only at times, however.
Today's book, While My Sister Sleeps, was written by Barbara Delinsky. Although it's also a drama based on a tragic set of circumstances, it's not as dismal, and the resolution doesn't leave a person with their guts hanging out. That's always a relief to me. Maybe I'm too fond of the "Hollywood ending," but I've never appreciated having my hero's plane go down in the last scene. Even when it's the only appropriate ending, it hurts too much.
So I'd suggest that if you'd like to read an extremely well written novel about family dynamics under crisis, in a family that's far from perfect but based on love, give this one a try. I do believe this book is a keeper. The characters are more than they first appear to be, and Delinsky manages some touchy subjects very well. She's obviously done her research.