By accidentally short-circuiting Professor Bullfinch's new crystalline material, Danny Dunn enables the professor to create a new machine that makes Danny invisible.
An 11-year-old discovers that not only is his seemingly ne'er-do-well grandfather a bona fide sorcerer but he too may have an untapped talent for magic.
"Horizon caravel book." An account of the 16th-century battle between the Spanish Armada and the English navy, which resulted in the defeat of the Spanish and changed the course of world history.
