The doomsday code / Alex Scarrow. - SHERLOC
The doomsday code / Alex Scarrow.
New York : Walker Books for Young Readers, 2012.
420 p. ; 22 cm.
Time travel -- Juvenile fiction.
Robin Hood (Legendary character) -- Juvenile fiction.
Grail -- Juvenile fiction.
Middle Ages -- Juvenile fiction.
Young adult fiction.
Originally published in Great Britain in 2011.
"The TimeRiders travel back to Robin Hood's Middle Ages to search for the mythical Holy Grail and to stop the future from changing"-- Provided by publisher.