I got this book as (an incredibly thoughtful) Christmas present from my friend Jen. It's essentially a picture book about depression, and it's beautiful. In one sentence per page it says more than your average self-help book (and a lot more than your average NHS leaflet!)
In places I literally wept with recognition, yet I still managed to finish the book with a smile on my face.
If you, or someone you love, has been affected by depression, then I cannot recommend this book enough.