Scarrow, Alex. City of shadows / Alex Scarrow. - London : Puffin, 2012. - 417 pages : 1 illustration ; 20 cm. - TimeRiders; 6. . ISBN: 9780141337074 (pbk.) : 0141337079 (pbk.) : Subjects--Topical Terms: Space and Time. Time Travel.--Fiction. Index Terms--Genre/Form: Science fiction.Young adult fiction.