Return of the Evil Twin (Sweet Valley High)

Danielle concludes Francine Pascal's saga of the evil twin with her second Sweet Valley High book: Return of the Evil Twin. One year after the traumatic encounter with their inexplicable doppelgänger, the Wakefield twins prepare to celebrate the new year, still lacking the therapy they so desperately need. However, they are soon beset by the long-lost identical twin sister to the murderous Margo who, against all reason, has decided to try and supplant Jessica as a new Wakefield twin; which is essentially the same scheme her sister failed at a year prior. Will the Wakefield sisters survive this latest crazed lookalike trying to replace them? Will their parents ever help them get much-needed therapy? Most importantly, how many separate identical sets of identical twins are there in this world? The answer to that last question, at least, is clear: More than would seem plausible.