Here is a book released with a loco or vice versa. Marklin 88422 BR 111 of the DB with experimental paint scheme was released in 2015 as the Nurnberg Toy Fair loco, it came complete with the complete ‘regular’ production Marklin Z catalog: Collection Marklin Spur Z, modellplan GbR, Goppingen, Germany, 2015. The nearly 800 page catalog is loaded with the complete list of ‘regular’ production Marklin Z each illustrated with description (German language only) including year/years produced and class/type.  Not only was the locomotive a very cool addition, but the book is essential for every collector of Marklin Z. Without the book collectors have no way to fully appreciate the sheer size of Marklin Z’s produced to date, it also is an archival reference for versions. One version that would have gone unnoticed without the catalog is 88219 which is the BR 213 diesel locomotive, it came in two versions: one with lettering at one end of the loco and a second version without lettering. Two versions of this limited run loco makes each a true rarity. One other useful feature of this catalog are the operating numbers provided in the description, maybe useful if you need to verify item number with car if you bought from secondary market. Marklin is producing new Z items with great gusto these days so follow-ups to this catalog are expected. This much anticipated and successful archive and catalog is due to the brilliant work of its author Mr. Thomas Zeeb. This soon to be unavailable anywhere loco and book set are still available from ajckids.com