Formidable footprints found! Something enormous is out there. It?s too big to be human. It must be a... High-interest topics, real stories, engaging design and astonishing photos are the building blocks of the XBooks, a new series of books designed to engage and motivate reluctant and enthusiastic readers alike....

Building on the theory of the demographic transition, Michael S. Teitelbaum assesses the dramatic decline in British fertility from 1841 to 1931 in terms of social transformations associated with the Industrial Revolution. His book is an intensive analysis of the British case at both county and national levels.Originally published in 1984....

Earth. Air. Fire. Water. These are the four nations that lived in harmony until the Fire Nation attacked. For the next hundred years, war raged across the globe. It was believed that all inhabitants from the Air Nation had perished. Then, a girl and her brother discovered a twelve-year-old boy frozen in an iceberg. His name: Aang....

The marvellous world of Mutants is brought to life as you prepare for the release of \"X-Men 3\" in cinemas May 2006. Find out how your favourite characters learnt how to control their super-powers and use them for good! Loads of action and......

Book Description Spider-Man can climb up walls, and leap and cling to almost anything. The vertical canyons of the city are his playground! In this new color/activity book, Spider-Man\'s wall-climbing ability is the focus of the fun and challenging games, puzzles, and coloring pages inside....

Batmana??s instincts tell him that Catwoman, The Riddler, Mr. Freeze, and Poison Ivy are all involved. But how could that be? They are all behind bars at Arkham Asylum. Batman knows these super-villains would never agree to work togethera?¦or would they? Is a copycat criminal to blame? How could one person be in all these places at once?...

Book Description The government\'s top agent is missing, and Jimmy Neutron has been recruited to find him! The boy genius goes across the world to find Agent X, who turns out to be Jimmy\'s super-spy hero, Jet Fusion!...

Following the success of the first edition, the updated and revised DC Comics Encyclopedia offers even more incredible DC detail and imagery than the original. 48 brand-new pages include major updates on characters and storylines (including the recent \"Infinite Crisis\" story arc)....