The TimeRiders travel back to Robin Hood’s Middle Ages to search for the mythical Holy Grail and to stop the future from changing.
- ISBN: 9780802733849
- Author: Scarrow, Alex
- Published: 2012 , Walker Books for Young Readers
- Themes: Adventure, Holy Grail, Robin Hood, Time travel
- Descriptors: England (UK), Europe, Science Fiction, Young Adult (ages 14-18)
- No. of pages: 420