John Cook (sometimes Cooke) was born in Leicestershire some time in 1608. He was hanged, drawn and quartered at Tyburn in October 1660. He is said to have been educated at Oxford and as a Young man, according to Ludlow (1894), spent a number of years abroad, living for several months in Rome and Geneva. By 1640 he was a barrister at Gray's Inn, where his acquaintances included the radical republican barrister John Bradshaw. Together, Cook and Bradshaw represented John lilburne in 1646 in the case that overturned Lilburne’s conviction before the Star Chamber in 1637. This brought Cook to prominence in republican circles, and in January 1649 he was appointed solicitor for the Commonwealth and ordered to prepare the case against Charles I. Cook prosecuted the case against the king with considerable zeal, and he published several pamphlets during and after the trial, making the case against the king to the public.
From The Biographical Dictionary of British Economists in Oxford Reference.