Sister - Rosamund Lupton

When her mom calls to tell her that Tess, her younger sister, is missing, Bee returns home to London on the first flight. She expects to find Tess and give her the usual lecture, the bossy big sister scolding her flighty baby sister for taking off without letting anyone know her plans. Tess has always been a free spirit, an artist who takes risks, while conservative Bee couldn’t be more different. Bee is used to watching out for her wayward sibling and is fiercely protective of Tess (and has always been a little stern about her antics). But then Tess is found dead, apparently by her own hand.

Bee is certain that Tess didn’t commit suicide. Their family and the police accept the sad reality, but Bee feels sure that Tess has been murdered. Single-minded in her search for a killer, Bee moves into Tess’s apartment and throws herself headlong into her sister’s life—and all its secrets.

Though her family and the police see a grieving sister in denial, unwilling to accept the facts, Bee uncovers the affair Tess was having with a married man and the pregnancy that resulted, and her difficulty with a stalker who may have crossed the line when Tess refused his advances. Tess was also participating in an experimental medical trial that might have gone very wrong. As a determined Bee gives her statement to the lead investigator, her story reveals a predator who got away with murder—and an obsession that may cost Bee her own life.

A thrilling story of fierce love between siblings, Sister is a suspenseful and accomplished debut with a stunning twist. (from Goodreads.com)

I was sucked in from page 1.  I have a sister who is 9 years younger than I am  and the whole time I was reading, I kept thinking "what if that was A?"  To be honest, during the 4 days it took me to read the book, I had nightmares each night that it was MY life.

The character development was really good.  I felt like I knew the characters, like they could have been my friends.  Even the characters who were in the book solely to throw you off as to the real killer were well written.

I guessed who the killer was the first time he was introduced (to be fair, I kind of guessed EVERY man when they were introduced), but then changed my mind to someone else.  So I was completely surprised with that.

My only problem?  I would have written a different ending.  The ending was great, but if I had written the book, I would have done the complete opposite.

My next book: Is Everyone Hanging Out Without Me? , which is written by a girl who writes for The Office.  Its okay.  I am not loving it, but it is good for the type of book it is (think Chelsea Handler light).