The most ubiquitous and perhaps the most intriguing number pattern in mathematics is the Fibonacci sequence. In this simple pattern beginning with two ones each succeeding number is the sum of the two numbers immediately preceding it 1 1 2 3 5 8 13 21 ad infinitum. Far from being just a curiosity this sequence recurs in structures found throughout nature from the arrangement of whorls on a pinecone to the branches of certain plant stems. All of which is astounding evidence for the deep mathematical basis of the natural world. With admirable clarity two veteran math educators take us on a fascinating tour of the many ramifications of the Fibonacci numbers. They begin with a brief history of a distinguished Italian discoverer who among other accomplishments was responsible for popularizing the use of Arabic numerals in the West. Turning to botany the authors demonstrate through illustrative diagrams the unbelievable connections between Fibonacci numbers and natural forms pineapples sunflowers and daisies are just a few examples. In art architecture the stock market and other areas of society and culture they point out numerous examples of the Fibonacci sequence as well as its derivative the golden ratio. And of course in mathematics as the authors amply demonstrate there are almost boundless applications in probability number theory geometry algebra and Pascals triangle to name a few.Accessible and appealing to even the most mathphobic individual this fun and enlightening book allows the reader to appreciate the elegance of mathematics and its amazing applications in both natural and cultural settings.