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  Title Copies
Doofuzz Dudes and the Princess Detector, The 
Year: 2006 
ISBN: 0977515923 
ISBN 13: 9780977515929 
Half-Minute Horrors 
ISBN: 0007339844 
ISBN 13: 9780007339846 
Percy Jackson and the last olympian 
Year: 2010 
ISBN: 0141321288 
ISBN 13: 9780141321288 
Quiet Magic: A Parable About Finding Happiness 
Edition: New edition 
Year: 2006 
ISBN: 1863550909 
ISBN 13: 9781863550901 
The 104-Storey Treehouse 
ISBN: 1760554170 
ISBN 13: 9781760554170 
The 13-Storey Treehouse 
Year: 2019 
ISBN: 0330404369 
ISBN 13: 9780330404365 
The 13-Story Treehouse 
Year: 2019 
ISBN 13: 9781742612379 
The 26-Storey Treehouse 
Year: 2019 
ISBN: 1742611273 
ISBN 13: 9781742611273 
The 52-Storey Treehouse (The Treehouse Series) 
Year: 2019 
ISBN: 1742614213 
ISBN 13: 9781742614212 
The 65-Storey Treehouse 
ISBN: 1743533225 
ISBN 13: 9781743533222 
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