Additional Suggestions from Readers

ARTEMISIA, Alexandra Lapierre. An art historian's highly researched account of Artemisia Gentileschi containing 40+ pages of footnotes.
ARTEMISIA, Anna Banti. Using a diary form, Banti carries on a dialogue with Artemisia, trying to discover why she finds her so fascinating.
CHASING CÉZANNE, Peter Mayle. A light-hearted romp through Provence (where else?) to track a looted Cézanne.
IN THE GARDEN OF EVIL, David Hewson. In a hidden studio in Rome, an art expert is found dead in front of a beautiful painting.
PICTURE OF DORIAN GRAY, Oscar Wilde. Infatuated with life and beauty, Dorian sells his soul to insure that his portrait would age instead of himself, discovering in the disfigured portrait the effect of his actions.
PORTRAIT OF JENNIE, Robert Nathan. A fantasy of sketching a girl who knows things before her time, ages overnight, and then disappears, a spirit.
REMBRANDT'S GHOST, Paul Christopher. Archeologist inherits house in Amsterdam containing what appears to be a fake Rembrandt.
STEALING ATHENA, Karen Essex. Two women separated by centuries but united by controversial paintings both defy social conventions of their times.
THE GREAT MAN, Kate Christensen. Two rival biographers vie for the truth of this fictional painter's secret life with his mistress.
THE LOST PAINTING, Jonathan Harr. In a decaying palazzo in an Italian hill village, a female graduate student discovers The Taking of Christ by Caravaggio.
THE PAINTER FROM SHANGHAI, Jennifer Cody Epstein. After her youth in a brothel, a woman becomes a bohemian painter in 1920's Paris.
WAKING RAPHAEL. Leslie Forbes. Restoration of a Raphael brings about a rash of miracles and violence.

Will those who suggested LOOT and THE IMMACULATE DECEPTION, please give me the authors and a brief description? I can't annotate because there are several books with these titles.

This is all I'll post on paintings. Part V will be novels dealing with other art forms.