Susan loves holidays on Granny's farm with its woods and caves, and this year her younger brother is old enough to come too. But the children are horrified when they find nasty Mr. Mustard wants to buy the farm. Who is he and what does he really want? Soon the race is on to stop him.

Is the old railway tunnel really haunted? Has Arthur really seen a ghosttrain? John and Susan have been warned to stay away but when Arthur disappears they have no choice but to try to find him. Reading age 3.8. Get this book for $0.99 while it is on pre-order!

Albert loves the great old tree that grows in his family's tiny city garden. When Mr Bates arrives with his chainsaw and Albert is horrified to find out what his Dad is planning. Reading grade 3.8.

The essays in the book analyze cases of cooperation in a wide range of ethnographic, archaeological and evolutionary settings. Cooperation is examined in situations of market exchange, local and long-distance reciprocity, hierarchical relations, common property and commons access, and cooperatives. Not all of these analyses show stable and long-term results of successful cooperation. The increasing cooperation that is so highly characteristic of our species over the long term obviously has...

E.F.F. Chladni’s experiments and observations with sound and vibrations profoundly influenced the development of the field of Acoustics. The famous Chladni diagrams along with other observations are contained in Die Akustik, published in German in 1802 and Traité d’Acoustique, a greatly expanded version, published in French in 1809. This is the first comprehensive translation of the expanded French version of Traité d’Acoustique, using the 1802 German publication...

Michael and his granddad shared a passion for trainspotting that his parents can't understand. But now the railway and granddad are gone, and Michael struggles to come to adjust. Things come to a head when his parents clear out granddad's old cottage. A haunting emotional journey. Reading grade 3.0.