This book is about the discovery of a skeleton which may belong to the Hungarian poet Sándor Petőfi. It provides an overview of the related events and documents. The design was inspired by spy stories, in which secret information can only be made visible under UV light. Similarly, the reader can go on a hunt for secrets in this book. It consists of three layers: the actual story, articles from the time of the discovery, and the UV layer, which contains handwritten comments and annotations by the author.