Along the coast of Peru is one of the driest deserts in the world. Here, under the sand, the ancient Peruvians buried their dead wrapped in gorgeous textiles. As organic material keeps almost forever when stored without humidity, light and oxygen, many of the mummies excavated in the last hundred years are in excellent conditions. And so are the textiles wrapped around them. Their clear colors are still dazzling and the textile fibers in good condition. Textiles were highly valued objects in ancient Peru - used for expressing status and diverse messages in these non-literate but highly organized and very developed cultures. Much energy, innovation and aesthetic sensibility were invested in the textiles. The preColumbian peoples had access to exquisite materials: the local fibers were camelid fibers (alpaca and vicuña), cotton and plant fibers (agave, for instance). The camelid fibers have very little scales compared to sheep fibers, and are long, soft and lustrous. The Peruvian cotton grew in 5 different colors. The ancient Peruvians were also master dyers and have for thousands of years dyed their yarn with indigo blue, madder red, cochineal red, sea snail purple and yellow from many kinds of plants. And so they produced some of the finest, most beautiful and most interesting textiles in the world. Instead of writing, they kept the order in their world encoded in textile fibers. The Roemer- and Pelizaeus-Museum in Hildesheim houses a collection of 405 preColumbian textiles. Most of them are fragments, but a few complete pieces are present. I have chosen 133 pieces for this publication, to represent the collection at its best.

This eighth volume of Imagine Math is different from all the previous ones. The reason is very clear: in the last two years, the world changed, and we still do not know what the world of tomorrow will look like. Difficult to make predictions. This volume has a subtitle Dreaming Venice. Venice, the dream city of dreams, that miraculous image of a city on water that resisted for hundreds of years, has become in the last two years truly unreachable. Many things tie this book to the previous ones. Once again, this volume also starts like Imagine Math 7, with a homage to the Italian artist Mimmo Paladino who created exclusively for the Imagine Math 8 volume a new series of ten original and unique works of art dedicated to Piero della Francesca. Many artists, art historians, designers and musicians are involved in the new book, including Linda D. Henderson and Marco Pierini, Claudio Ambrosini and Davide Amodio. Space also for comics and mathematics in a Disney key. Many applications, from Origami to mathematical models for world hunger. Particular attention to classical and modern architecture, with Tullia Iori. As usual, the topics are treated in a way that is rigorous but captivating, detailed and full of evocations. This is an all-embracing look at the world of mathematics and culture.