Waldo and Magic, Inc.
Waldo and Magic, Inc. is also known as Waldo: Genius in Orbit (1958).
First you might send for Waldo - if it's a real emergency. Actually you'd have to go to Waldo. Ill-tempered, domineering and mean-minded, he lives off-earth in his own bubble satellite, along with his faithful hound Baldur – the only guard dog to have mastered the weightlessness of space. But when it seems the fundamental laws of physics are ceasing to operate, then only Waldo, difficult though he is, has the genius to solve your problems. And then you might consider Magic, Inc. – a story of the future when the supernatural has become big business, when witchcraft is regulated by the Chamber of Commerce, and a very traditional protection racket is moving in on the neighbourhood – using some very elemental threats.
Robert A. Heinlein
Robert Anson Heinlein (1907–1988) was an American science fiction writer. Often called the "dean of science fiction writers", he was one of the most influential and controversial authors of the genre in his time. He set a standard for scientific and engineering plausibility, and helped to raise the genre's standards of literary quality.
He was one of the first science fiction writers to break into mainstream magazines such as The Saturday Evening Post in the late 1940s. He was one of the best-selling science fiction novelists for many decades. He, Isaac Asimov, and Arthur C. Clarke are known as the "Big Three" of science fiction.