''[It] does more than stick with me. It haunts me. I just can't recommend it enough.'', Maggie Stiefvater, bestselling author of Shiver
''It has been a while since I was so captivated by a character'', The Guardian
"This astonishing tale of friendship and truth will take wing and soar into your heart'" Laurie Halse Anderson, NYT bestselling author
'A compelling, uncompromising read - exciting'', Independent
''This is a remarkable book, which had me horrified and totally gripped at the same time'', Daily Mail
''... a rare young adult novel entirely about female power and female friendship'', New York Times
"A heartbreaking tale of friendship during WWII...A tour de force, unforgettable and wrenching," Kirkus Starred Review
''A rich and rewarding adventure story with multi-layered heroines and complicated emotions.', The Scotsman
''If you want an original read that will challenge your perceptions about truth, lies, bravery and deception, this is one for you'', Sugarscape
''[a] tale of espionage, torture and female derring-do.'', The Times
''Passionate writing with an utterly compelling story.'', Manda Scot, Chair of the Historical Writers' Association
''... full of convincing detail, heart-stopping emotion and tension.'', The Bookseller
''It has been a while since I was so captivated by a character'', The Guardian
"This astonishing tale of friendship and truth will take wing and soar into your heart'" Laurie Halse Anderson, NYT bestselling author
'A compelling, uncompromising read - exciting'', Independent
''This is a remarkable book, which had me horrified and totally gripped at the same time'', Daily Mail
''... a rare young adult novel entirely about female power and female friendship'', New York Times
"A heartbreaking tale of friendship during WWII...A tour de force, unforgettable and wrenching," Kirkus Starred Review
''A rich and rewarding adventure story with multi-layered heroines and complicated emotions.', The Scotsman
''If you want an original read that will challenge your perceptions about truth, lies, bravery and deception, this is one for you'', Sugarscape
''[a] tale of espionage, torture and female derring-do.'', The Times
''Passionate writing with an utterly compelling story.'', Manda Scot, Chair of the Historical Writers' Association
''... full of convincing detail, heart-stopping emotion and tension.'', The Bookseller