Bob FriedhofferBob Friedhoffers books on science and magic include: YET MORE MAGIC TRICKS, SCIENCE FACTS, OLD MAGIC AND TODAYS SCIENCE, PHYSICS LAB IN THE SPORTING GOODS STORE, PHYSICS LAB IN THE PLAYGROUND, PHYSICS LAB IN THE SUPERMARKET, PHYSICS LAB IN THE HOME, AGIC AND PERCEPTION, TOYING AROUND WITH SCIENCE, THE SCIENTIFIC MAGIC SERIESMATTER AND ENERGY; FORCES, MOTION AND ENERGY; HEAT; SOUND; ELECTRICITY AND MAGNETISM; AND LIGHTMAGIC TRICKS, SCIENCE FACTS; HOW TO HAUNT A HOUSE FOR HALLOWEEN. Read More Read Less