- L. of C. . Constable, 1917
- Buzz, Buzz! Essays of the Theatre. Collins, 1918
- Responsibility. Grant Richards, 1919/Hutchinson, 1943
- Alarums and Excursions. Grant Richards, 1922
- At Half Past Eight. Jonathan Cape, 1923
- Fantasies and Impromptus. Collins, 1923
- On An English Screen. John Lane The Bodley Head, 1924
- White Horse and Red Lion. Collins, 1924
- Blessed Are The Rich. Leonard Parsons, 1924/Hutchinson, 1944
- Agate's Folly. Chapman and Hall, 1925
- The Common Touch. Chapman and Hall, 1926
- Essays of Today and Yesterday. Harrap, 1926
- A Short View of The English Stage, 1900–1926. Herbert Jenkins, 1926
- Playgoing. Jarrolds, 1927
- Rachel. Gerald Howe,London; Viking Press, NY 1928
- Gemel In London. Chapman and Hall, 1928/Hutchinson, 1945
- Their Hour Upon The Stage. Mandarin Press, Cambridge, 1930
- The English Dramatic Critics, 1660–1932. Arthur Barker, 1932
- My Theatre Talks. Arthur Barker, 1933
- First Nights. Ivor Nicholson and Watson, 1934
|
- Kingdoms For Horses. Gollancz, 1936
- More First Nights. Gollancz, 1937
- Bad Manners. John Mills, 1938
- The Amazing Theatre. Harrap, 1939
- Speak For England. Hutchinson, 1939
- Express and Admirable. Hutchinson, 1941
- Thursdays and Fridays. Hutchinson, 1941
- Here's Richness! An Anthology of and by James Agate. Foreword by Sir Osbert Sitwell. Harrap, 1942
- Brief Chronicles. Jonathan Cape, 1943
- These Were Actors. Extracts from a Newspaper Cutting Book, 1811–1833. Hutchinson, 1943
- Red Letter Nights. Jonathan Cape, 1944
- Noblesse Oblige. Home and Van Thal, 1944
- Immoment Toys: A Survey of Light Entertainment on the London Stage, 1920–1943. Jonathan Cape, 1945
- Around Cinemas. Home and Van Thal, 1946
- Thus To Revisit. Home and Van Thal, 1947
- Oscar Wilde and The Theatre. Curtain Press, 1947
- Those Were The Nights. Hutchinson, 1947
- Around Cinemas, Second Series. Home and Van Thal, 1948
- Words I Have Lived With. A Personal Choice. Hutchinson, 1949
- A Shorter Ego. Volume Three. Harrap, 1949
|