A junior breakdown of the main sciences – chemistry, physics and biology. It's highly pictorial and built from snippets of wording, but it's not completely dumbed-down – this still has the full periodic table, and few books for audiences younger than this would be able to justify having it. And of course it skips around from subject to subject, touching on other things such as climatology, but not getting too far in the way of the other books in this attractive set. Yes, it does cover the physics of Earth's magnetic pole, the same as the 'The World' volume, but not to the detriment of either. Both can remain a healthy four stars, then.