Hamer, Martyn

Delve into the fantastic world of magic as you discover the secrets and tricks of the trade.

Describes the parts of a tree, the place of trees in the environment, and products made from trees.

Describes the origin, composition, orbit, and speed of different types of comets.

An introduction to planets, constellations, comets, meteors, and other objects that can be seen in the sky at night, with suggestions for nocturnal observers.