Psmith, Journalist is a novel by P. G. Wodehouse, first released in the United Kingdom as a serial in The Captain magazine between October 1909 and February 1910, and published in book form in the UK on 29 September 1915, by Adam & Charles Black, London, and, from imported sheets, by Macmillan, New York, later that year.

Through high spirits and force of personality, Psmith takes charge of a minor periodical, and becomes embroiled in a scandal involving slum landlords, boxing and gangsters – the story displays a strong social conscience, rare in Wodehouse's generally light-hearted works.

Mr Wilberfloss, editor of Cosy Moments magazine, is forced by ill-health to go away to the mountains for ten weeks of rest, leaving his subordinate Billy Windsor in charge.

Pugsy Maloney, the office boy, brings in a cat he has rescued from some ruffians in the street, which he says belongs to his cousin, gang leader Bat Jarvis.

Perusing Cosy Moments, Psmith tells Windsor they must sack the current writers and rebuild the paper in a more exciting style, and volunteers to act as unpaid subeditor.

Next day, Mike heads off to Philadelphia, and Psmith arrives at the offices to find them besieged by angry contributors, whom he soothes and takes out to lunch.

Returning, he sees Kid Brady, who has been complaining to Windsor that he cannot get a fair chance in the crooked world of New York boxing; they resolve to make the magazine his manager, and use it to boost his career.

The resulting inter-gang warfare leaves Cosy Moments unpestered for a time, and Psmith and Windsor head off to await the rent-collector in one of the tenement apartments.

Sending Maloney[2] to fetch Dude Dawson, Psmith and Windsor repair through a hatch to the roof with the rent-collector, holding out there until gang warfare draws their attackers away.

Pretending Mike is an English cat expert, they win Jarvis round, and he and his henchman Long Otto stand guard on the office the following day.

They drive out into the country, but get a flat tyre; while it is being fixed, Kid Brady comes along, out jogging, and distracts Parker long enough for Psmith to overpower him and escape.

Some months later, back in rainy Cambridge, Psmith hears that Waring lost his election, and that Kid Brady has won his chance at a title-fight, while Mr Wilberfloss has regained the paper's old subscribers.

[3] The first eleven chapters of the book follow the plot of the magazine version, with John Maude and Betty Silver meeting and falling out in Mervo.