The thickest book measures 4.08 m (13 ft 6.63 in) in width and was produced by Zeitgeist Media as ascertained on 6 October 2010 at Frankfurt Book Fair, Germany. The huge book called Das dickste Buch des Universums (The thickest book of the universe) contains texts and drawings from children sent in for a contest held by the Federal Ministry of Transport, Building and Urban Affairs of Germany and announced in Käpt’n Blaubärs Verkehrsfibel, a kids edutainment magazine for kids road safety.

The book contains 50,560 pages and weights 220 kg (485 lb). More than 40,000 kids took part in the contest to the item “kids & road traffic” and did send in their drawings and texts, which were scanned, printed and bound to the thickest book. The printing company used was GGP Media in Pößneck, Germany, a company of the Bertelsmann Group. The book is printed on demand, but can be ordered in any German bookshop for 9,999 Euros (ISBN 978-3-934046-46-7).