What's the book about?

Laureth Peak's father is a writer. For years he's been trying, and failing, to write about coincidence. His wife thinks he's obsessed, laureth thinks he's on the verge of a breakdown. He's supposed to be doing research in Austria, so when his notebook shows up in New York, Laurreth knows something is wrong… on impulse she steals her mother's credit card and heads for the States, taking her strange little brother Benjamin with her. Reunited with the notebook, they begin to follow clues inside, trying to find their wayward father.
Ahead lie challenges and threats, all of which are that much tougher for Laureth than they would be for any other 16-year-old.
Because Laureth Peak is blind.
Now watch this
Marcus Sedgwick made this fascinating video for us on the hidden numbers of She Is Not Invisible plus why you should read the book and review it for the Guardian young critics award.
Find out about Marcus Sedgwick
• Teen site member Patrick catches up with Marcus Sedgwick at the Edinburgh books festival and hears all about his latest book: Ghosts of heaven.
• Listen to Marcus Sedgwick read from She Is Not Invisible and discuss it with Henry Partridge, a blind teenager from a group that advised Marcus on the story.
And now… write your review!
The Guardian young critics competition is for all young readers to share their views on any of the longlisted books. Anyone aged 17 or under can enter by writing a review of no more than 200 words of one of the books longlisted for the prize. Individuals or school/library classes/bookgroups can enter and there are great prizes to be won including all the longlisted books. You can find out more and enter the competition here.
Find out more about all the authors Guardian children's fiction prize book club.