The Perfectionists series actually consists of two books: The Perfectionists, and its sequel, The Good Girls, but as its unlikely that Season 1 will get too far into the second book, this article ...

"Pretty Little Liars" spin-off "The Perfectionists" premieres March 20. It's loosely based on books by Sara Shepard, who wrote the book series "Pretty Little Liars" and "The Lying Game." ...

But the new series, based on the popular book series The Perfectionists written by PLL author Sara Shepard, could not come close to the blockbuster ratings success and social media popularity of PLL.

In addition to Pretty Little Liars, Shepard also penned The Perfectionists book series, both of which have collectively inspired a franchise spanning four television series—Pretty Little Liars ...