The ninth book in the beloved, bestselling Redwall saga - soon to be a major Netflix movie! Far away, on the isle of Sampetra, the evil Emperor Ublaz sends his lizard army on a murderous mission to Redwall. Meanwhile, Tansy the hedgehog and her fellow Abbey dwellers race against time to unravel the fiendishly difficult riddles leading to six rose-coloured gems - the Pearls of Lutra.