From the outside, everyone might think Fern and Rose are as close as twin sisters can be: Rose is the responsible one and Fern is the quirky one. But the sisters are devoted to one another and Rose has always been Fern’s protector from the time they were small.

Fern needed protecting because their mother was a true sociopath who hid her true nature from the world, and only Rose could see it. Fern always saw the good in everyone. Years ago, Fern did something very, very bad. And Rose has never told a soul. When Fern decides to help her sister achieve her heart’s desire of having a baby, Rose realizes with growing horror that Fern might make choices that can only have a terrible outcome. What Rose doesn’t realize is that Fern is growing more and more aware of the secrets Rose, herself, is keeping. And that their mother might have the last word after all.

I have not been disappointed in a Sally Hepworth book yet, and The Good Sister is no exception! Talk about a page-turner! I couldn’t put the book down, and finished this compelling story in one day.

Rose and Fern are adult sisters who’ve only had each other to rely on for as long as they can remember. Rose is calm and responsible and protective; Fern has sensory issues and struggles to understand the nuances of interpersonal communications, completing missing nonvisual cues and unable to take words as anything but literal.

When Rose shares with Fern her heartache over infertility, Fern decides to have a baby for Rose. And when she meets a sweet guy at the library where she works, Fern realizes that he’s a good candidate for the baby’s father.

Things don’t always go as expected, and as Fern becomes attached to the man she calls Wally, Rose becomes uneasy about the relationship and the feeling that Fern is pulling away from her.

Man, this book is hard to talk about without entering spoiler territory!

Told through Rose’s diary entries and Fern’s first-person narration, we learn bits and pieces about the sisters’ bond, their painful childhood, and their memories of their mother. We also learn more about why and how Fern became so dependent on Rose, and why neither of them consider Fern to be reliable or trustworthy.

It’s only as we get deeper into the story that we start to realize that neither sister is telling the whole story, and that what we’re hearing might not be the true picture of certain key events. Puzzling out the pieces and figuring out what’s true and what’s a lie makes this an incredibly engrossing read.

I especially loved Fern’s character. She’s unusual and has certain needs when it comes to interacting with the world, but she’s also very loving in her own odd way. And hey, she’s a librarian! And a really great one — despite her outward prickliness and tendency to ignore people who ask for help with the library photocopier, she’s terrific at helping people find what they need, whether it’s the right book or a bit of distraction, a way to calm down or even just some basic toiletries so they can use the public showers.

The plot of The Good Sister has some very clever twists and turns, and honestly, I just could not stop reading once I started. I won’t say more about the story, because it’s just too much fun to experience it without advance clues or information. Sally Hepworth has written yet another engrossing story with memorable characters, and I heartily enjoyed it. Don’t miss The Good Sister!