If you don’t know my sisters, you don’t know me,” said a colleague of bestselling author Coco Mellors during a luncheon well before she became a literary sensation with her debut novel Cleopatra and Frankenstein. Like Mellors, this colleague was also one of the four sisters. This declaration compelled the author to think about how much of who she is has resulted from the bond she has with her siblings.

But Mellors has noted previously that she is “interested in breaking something that’s harmonious,” so in her second novel , she creates a world where three sisters are seen grappling with the loss of the fourth one. In the Prologue, Mellors writes that a “sister is not a friend” because you don’t get to choose your sister: “You’re part of each other, right from the start.” To that end, it’s correct to say that a part of Avery, Bonnie, and Lucky died with Nicky.

It may, therefore, seem that Blue Sisters is about the three sisters trying to make sense of a Nicky-shaped hole in their lives, but that would be a limited reading of the novel. Sisterhood most definitely is the core of the book, but it’s the arguments regarding how to rebuild one’s life when one has spent a good part of it trying to escape from it that Mellors makes. The story demonstrates how deeply thoughtful a work of fiction is.

It begins with Lucky, the youngest and most reckless of the pack of four. She’s a Paris-based model, an alcoholic and drug addict. After getting wasted throu.