If you need a read that keeps your mind distracted during times of bedrest or in-between nurses coming in to check on you, check out Girl on a Train. This book will keep your attention. Note esp. good if have low blood pressure, as the suspense will drive it up!
Sometimes when you don't feel well, you just want a feel good story that lifts away mental funks. Try Garden Spells and the second book in series First Frost.