Amanda Craig: 'Ellen Renner's debut, Castle of Shadows, is not to be missed … Renner's story bristles with talent and brio, craft and polish … The ending leaves you panting for the sequel, City of Thieves, out this summer.'

Sue Chambers, Waterstones Harrods: 'A wonderful tale of discovery and trust....with a difference. Enjoy it - a book to settle down with in front of a fire...' Five stars.

Luisa Plaja, Chicklish: 'Castle of Shadows will be a huge hit with fans of mysterious, absorbing and action-packed novels aimed at readers aged 9+.'