Even though I knew this was somewhat a prequel to the first Wayward Children, I still kinda hoped for more. 
 HOWEVER, as a straight story and judging it on its own merits, I can find absolutely no fault. 
 This is a story of twins being mirrored darkly, rather messed up by their short-sighted and self-consumed parents, twisted by circumstance and then later by their own choices, this entire novella is a frame and a mirror to highlight the differences between gender expectations and how it can pull a big number on these poor kids. 
 Later on, we're given some rather nasty service when we add a vampire Master and a necromancer Doctor into the mix. Separating the twin sisters by their own desires adds a separate mirroring effect... in effect of how to create a monster or how to heal one, applying it to great story effect. 
 It's a story of identity and love, of influence and choice, and all told, it's quite beautiful to behold. 
 But to be honest? I still love the first one more for its sheer imaginative effects. :)