Amazon has pulled the eBook Young Caravaggio – One Hundred Rediscovered Works after the research from the book has come into question.

The book by art historians Maurizio Bernardelli Curuz and Adriana Conconi Fedrigolli claims to have identified a hundred previously unknown drawings by Caravaggio after looking through the archives. But other art historians are skeptical of the book’s claims, which has rendered the book controversial.

The Telegraph UK has more: “A spokesman for Amazon in Italy confirmed that the book was no longer on sale but declined to comment on whether the book had been withdrawn because of doubts over the calibre of the research. ‘It was available, but no longer,’ she told The Daily Telegraph. Meanwhile Stefano Boeri, a cultural official with Milan city council, announced the launching of an investigation to ascertain ‘the correctness of the procedures regarding the publication’ of the e-book.”