It's such a savage thing to lose your memory, but the crazy thing is it doesn't hurt one bit. A blackout doesn't sting or stab or leave a scar when it robs you. Close your eyes and open them again. That's what a blackout feels like.

For Sarah Hepola, alcohol was 'the gasoline of all adventure'. She spent her evenings at cocktail parties and dark bars where she proudly stayed till last call. Drinking felt like freedom, part of her birthright as a strong, enlightened 21st-century woman.

But there was a price. She often blacked out, waking up with a blank space where four hours should be. Mornings became detective work on her own life. What did I say last night? How did I meet that guy?

She apologized for things she couldn't remember doing, as though she were cleaning up after an evil twin. Publicly she covered her shame with self-deprecating jokes, and her career flourished, but as the blackouts accumulated, she could no longer avoid a sinking truth. The fuel she thought she needed was draining her spirit instead.

A memoir of unblinking honesty and poignant, laugh-out-loud humor, Blackout is the story of a woman stumbling into a new kind of adventure - the sober life she never wanted. Shining a light into her blackouts, she discovers the person she buried as well as the confidence, intimacy and creativity she once believed came only from a bottle.

Her tale will resonate with anyone who has been forced to reinvent themselves or struggled in the face of necessary change. It's about giving up the thing you cherish most - but getting yourself back in return.