The New York Times acknowledges the death of Richard Turner, Leonardo scholar, who published Inventing Leonardo in the 1990s:

The well-known reticence of Leonardo, whose notebooks were not published until the late 19th century, and the scarcity of his work have made him elusive prey for the art historian. Mr. Turner, spying an opportunity in this information vacuum, focused on the multiple Leonardos created by biographers, critics and artists from Vasari to Freud and beyond, each reshaping the artist and man according to his own cultural values and notions of creativity.

“There is a 1550 Leonardo, an 1800 one, an 1850 one, and so on,” Mr. Turner wrote in his introduction. “Each is a different character based on the needs of the given time that produced him, and each has ties to the Leonardo that went before.”

A. Richard Turner Dies at 79 (New York Times)