Sick Fux by Tillie Cole

When Ellis Earnshaw and Heathan James met as children, they couldn’t have been more different. Ellis was loud and beautiful – all blond hair, bright laughs and smiles. Heathan was dark and brooding, and obsessed with watching things die.
The pair forged an unlikely friendship, unique and strange. Until they were ripped apart by the sick cruelty of others, separated for years, both locked in a perpetual hell.
Eleven years later, Heathan is back for his girl. Back from a place from which he thought there was no return. Back to seek revenge on those who wronged them.
Time has made Heathan’s soul darker, polluted with hatred and the thirst for blood.
Time has made Ellis a shell of her former self, a little girl lost in the vastness of her pain.
As Heathan pulls Ellis out of her mental prison, reviving the essence of who she once was, down the rabbit hole they will go.
With malice in their hearts and vengeance in their veins, they will seek out the ones who hurt and destroyed them.
One at a time.
Each one more deadly than the last.
Tick Tock.

Dark Contemporary Romance. Contains explicit sexual situations, violence, disturbingly sensitive and taboo subjects, offensive language and very mature topics. Recommended for ages 18 and over.

I'm not sure what I make of this book if I'm honest.  I love Tillie Cole's books, and am an avid fan, particularly of her Hangmen series, which is pretty dark. 
Sick Fux is described as dark...which it is, but I'm not sure that I loved it as much as her other books.  When I was reading I didn't feel that love for the characters.  I didn't feel completely invested in the story.
Dolly and Rabbit were interesting characters...but I didn't love them.  I felt so awful for them for what they went through as children as it was really awful, and hard to read to be honest.
I understood why Dolly and Rabbit (real names Ellis and Heathan) created an alternate world and identity for themselves. 
Over all, I'm glad I finally read this one, but I think it was a little disappointing.  It just wasn't as the same level as her others books that I've read.
Beware this could be very triggering for some as not only is the violence pretty graphic, the child abuse situations are very disturbing.
2.5/5 stars.