Mental Radio illustrated Upton Sinclair - "Mental Radio" documents Sinclair's test of psychic abilities of Mary Craig Sinclair, his second wife, while she was in a state of profound depression with a heightened interest in the occult. She attempted to duplicate 290 pictures which were drawn by her brother. Sinclair claimed Mary successfully duplicated 65 of them, with 155 "partial successes" and 70 failures. The experiments were not conducted in a controlled scientific laboratory environment. Fully illustrated with the original artwork.

Upton Beall Sinclair, Jr. was an American author who wrote close to one hundred books in many genres. He achieved popularity in the first half of the twentieth century, acquiring particular fame for his classic muckraking novel, The Jungle (1906). To gather information for the novel, Sinclair spent seven weeks undercover working in the meat packing plants of Chicago. These direct experiences exposed the horrific conditions in the U.S. meat packing industry, causing a public uproar that contributed in part to the passage a few months later of the 1906 Pure Food and Drug Act and the Meat Inspection Act. The Jungle has remained continuously in print since its initial publication. In 1919, he published The Brass Check, a muckraking exposé of American journalism that publicized the issue of yellow journalism and the limitations of the free press in the United States. Four years after the initial publication of The Brass Check, the first code of ethics for journalists was created. Time magazine called him "a man with every gift except humor and silence." In 1943, he won the Pulitzer Prize for Fiction.