From the back cover:
"Trilobites are some of the most diverse and interesting creatures ever to have inhabited the seas of our planet. They were some of the first animals to have eyes and be fossilized. They spanned 300 million years and include over ten thousand species. In recent years, new theories have shed fresh light into the life styles of these wonderful organisms. Come and learn this newly discovered information, it's sure to change the way you think about the "Mysterious Trilobites"."