Dutch-language paperback Bouwbonje om een Staalskelet by Peter de Zwaan, part of the well-known Bob Evers adventure series. Originally created by Willy van der Heide, the Bob Evers books follow the adventures of Bob and his friends as they become involved in exciting mysteries and daring escapades around the world. In this story the characters become entangled in intrigue surrounding a construction project and a mysterious steel structure, leading to a fast-paced adventure filled with danger and investigation. Published by Uitgeverij De Eekhoorn in 1992, this later printing remains a collectible title from a long-running and popular Dutch youth series.