Come and Find Me by Hallie Ephron
Reformed hacker Diana Highsmith hasn’t left her house in over a year . . .
. . . not since she watched the man she loved fall to his death in the Swiss mountains. Now a grief-stricken recluse, she runs a thriving Internet security company from her home—meeting with clients in OtherWorld, an online virtual reality platform where she lives as her avatar, Nadia. The only two people Diana has seen live in the past twelve months are her sister, Ashley, and her UPS delivery guy.
But when Ashley vanishes, Diana is forced to do the unthinkable: to brave both the outside and her own personal demons to find her missing sister. As one shaky step leads to another, Diana finds that the trail she is following is fraught with peril for her and her sister both—as she uncovers a frightening web of deceit and betrayal that stretches from the virtual world into real life.
OK, so let me start by saying I literally just watched a show about people who participate in version 2.0 or "other reality" lives. Basically, it's like that game Sims, but the characters are "real" and people fall in love and basically let this take over their real life. Freaks and weirdos, peeps. So then I started reading this book and was immediately annoyed because people who fall into that probably need professional mental help.
I found that this book was slow to get going and at one point I really wanted to give up. Eventually I started getting into it once her sister goes missing and she ventures out of her house. I absolutely loved how Hallie twisted the plot at the very end because I can say I absolutely did not see it coming. I had a suspicion about one character, but the other? Did not see it. Not at all. Except now when I think back about certain parts of the book I probably should have seen it- but that's OK. I will say that my heart kind of broke for Diana. And when you read the book you'll know why- it's definitely not the ending I wanted for her so much, but I think that maybe if this were a real life person, she'd recapture some of her life back.
Hallie is on Facebook and has a website too! I also suggest you check out what other bloggers said about this book as well.