Kalagnanam is a Telugu language book by 16th-century Indian saint Potuluri Veerabrahmam about the past, present, and the prediction of future.
A brief part of Kalagnanam written by Veerabrahmam, which was kept in his native place was published in Telugu as a book by Brahmamgari Matham in 1970 for the first time, along with other works of the saint.
Most prophecies in the Kalagnanam, describe the coming king-cum-avatar, Veera Bhoga Vasanta Rayalu and his acts.
About 70 percent of the prophecies speak of him, while other parts describe future events mainly in South India.
Another saint, Sarvajna had prophesied during the rule of Bijjalaraya the emergece of Veera Bhoga Vasanta Rayalu in his poetry collection Dwipada.