His first publication was 'Certaine Fruitfull Instructions and necessary doctrines meete to edify in the feare of God: faithfully gathered together by Iohn Frewen,' London, 1587.
In 1598 he edited, and wrote the preface to, a pamphlet of eighty-eight pages, entitled 'A Courteous Conference with the English Catholickes Romane, about the six articles ministered unto the Seminarie Priests,' London.