The Third Twin by CJ Omololu

Ava and Lexi are identical twins. Growing up they invented Alicia. Someone broke a lamp? Must be Alicia. As teenagers they use Alicia to take on a new personality, go places they may not have otherwise gone, date boys they wouldn't otherwise date. Then a boy "Alicia" dated turns up dead.

This book takes an interesting twist on a murder mystery. You wonder who did it and, of course, suspect both twins. I enjoyed this one. Recommended for mystery fans.