The parcel, which was mailed from Ukraine to Lithuania, raised suspicions to customs officers as it weighed too heavy to be a book. After opening the package, they found that the book, House of Horror, contained 68 sixteenth-century silver coins in a cavity made by cutting out pages. The coins are estimated to be worth over €13,000.
Some of the coins are believed to date back to the Polish–Lithuanian Commonwealth, while others are Old Russian coins – extremely thin coins made during times of silver shortage.
The coins and the book have been seized.