Publisher ‏ : ‎ Scholastic (15 March 2017) Language ‏ : ‎ English Paperback ‏ : ‎ 128 pages ISBN-10 ‏ : ‎ 9789386313195 ISBN-13 ‏ : ‎ 978-9386313195 Reading age ‏ : ‎ 7 - 12 years Item Weight ‏ : ‎ 140 g Dimensions ‏ : ‎ 20.3 x 25.4 x 4.7 cm Geronimo Stiltonootand friends have been invited to participate in a Stone Age treasure hunt! How fun! The one issue is that it has been set up by Gossip Radio host Sally Rockmousen, Geronimo's rival. Is it some sort of trick? The hunt is full of difficult riddles and very stinky dinosaurs.. but nothing will stop Geronimo's team!