'Half Bad' by Sally Green is a debut novel about one boy's struggle for survival in a hidden society of witches. You can't read, can't write, but you heal fast, even for a witch. You get sick if you stay indoors after dark. You hate white witches but love Annalise, who is one. You've been kept in a cage since you were 14. All you've got to do is escape and find Mercury, the black witch who eats boys. And do that before your 17th birthday. Easy!