Rome (CNN) Vatican documents and taped conversations, leaked to Italian journalists and published in two new books, allegedly reveal numerous financial scandals and extravagant expenditures in the Vatican as well as the private admonitions of Pope Francis to his closest advisers.

"Something isn't right! We have to get this problem under control," the Pope is alleged to have said during a meeting with his financial oversight committee in July 2013. The conversation is detailed in the book "Merchants in the Temple," by Italian journalist Gianluigi Nuzzi, which was published on Wednesday.

The book claims the Pope complained to the committee in particular about the excessive number of employees hired at the Vatican and inflated bills from outside contractors, hired and paid without due diligence.

"It's no exaggeration to say that most of our costs are out of control," the Pope is alleged to have said. "We always have to check the legality and clarity of contracts with the utmost attention."

"Clarity. That what's done in the most humble companies, and we have to do it, too." the Pope said, according to the book.

Read More