"Secret of the Painting" by Robert Moore Williams is a science fiction novel written in the mid-20th century. The story revolves around a mysterious painting that is believed to contain a secret that could transform the scientific world. It combines elements of adventure, intrigue, and the quest for hidden knowledge, presenting a narrative that explores the boundaries between art, science, and human ambition. The plot centers on Tom Calhoun, a brilliant scientist who acquires a painting that he believes hides vital scientific secrets. As he works to uncover these secrets, he faces threats from various adversaries who seek to exploit the painting's knowledge for their own gain. The protagonist, Luke Shaw, serves as both a protector and friend to Tom and becomes embroiled in a life-or-death struggle when their lab is attacked, and Tom's assistant, Ann, is severely injured in a fire caused by thieves. As Tom leverages his genius to save Ann and confront the villains, the story climaxes with a demonstration of the transformative power of his invention stemming from the painting, leading to a blend of dramatic resolution and a hint at the profound possibilities of science. (This is an automatically generated summary.)