The former Yugoslavia, on the brink of war and disintegration, was a scenic but intriguing location in which to undertake a cycling tour on a shoestring. The most formidable challenge proved to be finding a way out and returning home safely once the tour was completed, in a country where the unexpected came to be expected.

The author, Dr. David Ward, is a physicist, educator, home-school parent, and entrepreneur. He received his PhD from MIT and was a post-doctoral fellow at Harvard University. He has publications in Nature, Physical Review Letters, and the Physics Teacher, to name a few. The characters in "Sarah and Sam Save the School with Even Numbers," are based on characters from the martian mathematics curriculum used by homeschoolers. He originally developed the curriculum for his own children, but it is now available to the public at MartianMathematics.com.