Francesco Gonzaga. After Pius II had reorganized the College of Abbreviators (1463), and increased the number to seventy, Platina, in May 1464, was elected a member. Probably in the summer of 1465 Platina composed De honesta voluptate et valetudine ("On honourable pleasure and health"). This first printed cookbook, a monument of medieval cuisine in Renaissance intellectual trappings, left the press in 1474 and ran into dozens of editions, disseminating Roman ideas about fine dining throughout Western Europe. In a display of humanist learning Platina embedded recipes from the famous chef, Maestro Martino de' Rossi, whom he had met in the summer of 1463 at Albano, where Platina was the guest of Martino's employer, a cardinal. When Paul II abolished the ordinances of Pius, Platina with the other new members was deprived of his office. Angered by this, he wrote a pamphlet demanding from the pope the recall of his restrictions. When called upon to justify himself he answered with insolence and was imprisoned in the Castel Sant'Angelo, being released after four months on condition that he remain at Rome. In February 1468, with about twenty other humanists, he was again imprisoned on suspicion of heresy and of conspiring against the life of the pope. The latter charge was dropped for lack of evidence, while they were acquitted on the former. However, members of the Roman Academy were found guilty of immorality. After his release on July 7, 1469, he expected to be again in the employ of Paul II, who, however, declined his services. Platina threatened vengeance and executed his threat, when at the suggestion of Sixtus IV he wrote his (1479). In it he paints his enemy as cruel, and an archenemy of science. For centuries it influenced historical opinions until critical research proved otherwise. In other places party spirit is evident, especially when he treats of the condition of the Church. Notwithstanding, his Lives of the Popes is the first systematic handbook of papal history. Platina felt the need of critical research, but shirked the examination of details. By the end of 1474 or the beginning of 1475 Platina offered his manuscript to Pope Sixtus IV; it is still preserved in the Vatican Library. After the death of Giovanni Andrea Bussi, Bishop of Aleria, the pope appointed Platina librarian with a yearly salary of 120 ducats and an official residence in the Vatican. He also instructed him to