An autographed first edition of the 1967 novel One Hundred Years of Solitude by the late Nobel Prize laureate Gabriel García Márquez has been stolen from a locked cabinet at the Bogota International Book Fair, AFP reports.

This year, the fair was dedicated to the acclaimed novelist who passed away last year at the age of 87. He was considered a founding father of the literary style of magical realism.

The fair included a pavilion themed after Macondo, the mythical town that features in the novel and other works by the author.

The book, which disappeared on Saturday, was one of just 8,000 copies printed in 1967, and its value is estimated at $60,000.

But the owner, rare books dealer Alvaro Castillo, says its value is immeasurable. Castillo collects first editions by Garcia Marquez, bought the book in 2006.

García Márquez later signed the copy with the following dedication: “To Alvaro Castillo, the old book-seller, as yesterday and always. Your friend, Gabriel.”

“We’re looking at the cameras,” said Bogota police chief Humberto Guatibonza. “Unfortunately there were none at the stand, but there were at the entrance to the pavilion.”

It is estimated that about 8,000 people passed through the exhibit that day.

Following García Márquez’s death in Mexico in April of 2014, value has gone up for first editions of his novels.