Irises by Fransisco X. Stork is a heartwrenching tale of two sisters after their father passes away. They have their mother, who was left brain-dead after a terrible accident a few years earlier, and each other. This book is the perfect sister story and I highly suggest it for those who want to smile through their tears at the end.
This takes you on the story of Mary and Kate. Mary is the artist who loves their mother even though she really isn't there anymore and Kate is the brilliant older sister who has everything she could ask for: a reliable boyfriend, a good education; but she always wanted more. So she decides to rebel and she loses everything really quickly.