- Author: Michael Patrick Hearn Author Record # 28504
- Birthdate: 24 April 1950
- Language: English
- Webpages: Library of Congress, Wikipedia-EN
- Used These Alternate Names: Michael Hearn, Michael P. Hearn
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Anthologies Chapbooks
- The Porcelain Cat (2004)
- W. W. Denslow (1976) with Douglas G. Greene
- The Porcelain Cat (2004)
- Curses! (1976)
- "Baum's Mystic Shrines of Pretty Fancy": Amy Leslie's Reviews of Oz (1994)
- "Baum's Mystic Shrines of Pretty Fancy": Amy Leslie's Reviews of Oz (Part II) (1994)
- "Baum's Mystic Shrines of Pretty Fancy": Amy Leslie's Reviews of Oz (Part III) (1995)
- "Call Me Maggie" (1985)
- "Queer Visitors" Revisited (1994)
- A "Lost Princess" Found (2017)
- A Bibliography of the Work of W. W. Denslow: Additions and Corrections (1980) with Douglas G. Greene
- A Visit with the Not So Wicked Witch (1971)
- A Writer's Road to Oz: The Annotator Addresses the Influence of Oz (2008)
- Afterword (At the Back of the North Wind) (1986)
- Afterword (Ozoplaning with the Wizard of Oz) (1990)
- An Illustrator's Illustrator (Part I) (1994)
- Annotations (The Annotated Wizard of Oz) (1973)
- Bibliographia Baumiana: Baum's Complete Stamp Dealers Directory (1986)
- Bibliographia Baumiana: The Book of the Hamburgs (1986)
- Bibliography (The Annotated Wizard of Oz) (1973)
- Charles Santore's Journet to the Great Oz (1990)
- Commentary (The Baum Bugle, Winter 1984) (1984)
- Cynthia Baum Tassini: 1909—2005 (2005)
- Denslow Addenda (1963) with David L. Greene and Douglas G. Greene and Justin G. Schiller and Manuel Weltman
- Evan McCord (1927—2012) (2012)
- Excerpt from The Annotated Wizard of Oz (2000)
- Foreword (The Wizard of Oz) (2010)
- Frances Ozma Baum Mantele: 1916-1999 (1999)
- How Did the Woggle-Bug Do? (1974)
- How Many People Have Read The Wizard of Oz? (excerpt from The Annotated Wizard of Oz) (2000)
- Introduction (Denslow's Picture Book Treasury) (1990)
- Introduction (Little Wizard Stories of Oz) (1985)
- Introduction (The Annotated Wizard of Oz) (1973)
- Introduction (The Annotated Wizard of Oz: A Centennial Edition) (2000)
- Introduction (The Denslow Picture Book Treasury) (2010)
- Introduction (The Wizard of Oz) (1991)
- Introduction (The Wizard of Oz: The Screenplay) (1989)
- Introduction (Twinkle and Chubbins: Their Astonishing Adventures in Nature-Fairyland) (1987)
- Introduction to the Dover Edition (The Pearl and the Pumpkin) (2009)
- Is Dorothy Guilty of Murder? (excerpt from The Annotated Wizard of Oz) (2000)
- L. Frank Baum: Amateur Printer (1986)
- L. Frank Baum: Chicken Fancier (1986)
- Letters to the Editor (The Baum Bugle, Winter 1990) (1990)
- Little Freddy Oz Fan (2004)
- Lost "Adventures in Oz" (1995)
- Oz & Ends (The Baum Bugle, Autumn 1968) (1968) with Stanley Barker and March Laumer and William G. Lee and Alexander Thorburn and Lois Thorburn and Melissa Thorburn
- Oz & Ends (The Baum Bugle, Autumn 2011) (2011) with Jane Albright and John Bell and Blair Frodelius and Peter E. Hanff and Dee Michel and Karen Owens and Sharon Ray and Richard R. Rutter
- Oz and Ends (The Baum Bugle, Autumn 1969) (1969) with Brian A. Baker and Sonia Brown and Sedgie Halpern and Susan Liehe and Michael O. Riley and Eloise Sterger
- Oz and Ends (The Baum Bugle, Autumn 1989) (1989) with Earl C. Abbe and Sonia Brown and Greg Ehrbar and John Fricke and Michael Gessel and Barbara S. Koelle
- Oz and Ends (The Baum Bugle, Autumn 2008) (2008) with Jane Albright and John Fricke and Blair Frodelius and Marcus Mébès and Sharon Ray
- Oz and Ends (The Baum Bugle, Spring 1970) (1970) with John Fricke and Glen W. Hunter and William G. Lee and Mr. John H. Pattrick and Mrs. John H. Pattrick and David J. Willimas, III
- Oz and Ends (The Baum Bugle, Spring 1990) (1990) with Carlos Colon and Martha Cornog and Vernon Crawford and Michael Gessel and Douglas G. Greene and Fred M. Meyer and Timothy Perper and Stephen Sisters
- Oz and Ends (The Baum Bugle, Winter 1989) (1989) with Jane Albright and Alexandra Davis and Michael Gessel and Fred M. Meyer and Daniel Smith
- Oz and Ends (The Baum Bugle, Winter 1995) (1995) with Willard Carroll and Michael Gessel and Barbara S. Koelle and Vita A. Lanza and David Moyer
- Oz and Ends (The Baum Bugle, Winter 2016) (2016) with Sue Ferrara and Blair Frodelius and Daniel Horne and David Moyer
- Oz Behind the Footlights (The Baum Bugle, Autumn 1968) (1968) with Mr. Henry S. Blossom and Mrs. Henry S. Blossom and Mrs. Robert R. Covell and Matilda J. Gage and Kevin Harris and Carl T. Hartmann and Mrs. Ted Leber and William G. Lee and Mrs. C. Coleman McGehee and Mr. John H. Pattrick and Mrs. John H. Pattrick and Susan Sherman and James H. Teller
- Oz in the News (The Baum Bugle, Spring 2005) (2005) with M. A. Berg and Angelica Carpenter and Collin Clark and Barbara Evans and Max Kramer Goodall and Judith Harris and Robin Hess and David Kempel and Steve Klein and Seth Alan Markell and Mildred Martin and Dee Michel and David Moyer and Kathleen Sorbello Di Scenna and Debra Silver and Carol Sterlee and Donna Stewart-Hardway and Colleen Zimmer
- Oz Recordings (1971)
- Peter Newell (1862–1924) (1990)
- Return to The Marvelous Land of Oz: One Hundred Years Later (2004)
- Silent Oz (1993)
- Sowing Good Seed in Dinotopia (2011)
- The Bugle Review (The Baum Bugle, Spring 2019) (2019) with Atticus Gannaway and Dee Michel
- The Denslow Appendix (1973)
- The Faltering Flight of Prince Silverwings (1974) with David L. Greene and Peter E. Hanff
- The Hatching of Father Goose (1999)
- The Lost Scarecrow and Tin-Man Comic Page (1972)
- The Man Behind the Man Behind Oz (2009)
- The Mantle of Oz is Passed (1991)
- The Oz Bookshelf (The Baum Bugle, Autumn 1984) (1984) with Rob Roy MacVeigh and Michael O. Riley and Dan Smith (II) and Richard Paul Smyers
- The Oz Bookshelf (The Baum Bugle, Autumn 1991) (1991) with Chris Dulabone and Irene Fisher
- The Piglet Problem (1969)
- The Reluctant Retirement of a Royal Historian (1989)
- The Wizard Behind the Plate: L. Frank Baum, the Hub City Nine, and Baseball on the Prairie (2000)
- W. W. Denslow and His Weekly "Bounce" (2015)
- Oz Christmas Card (1969)
- The Wonderful Land of Oz (1963)
- The Wooden Soldiers of Oz (1969)
- Before Oz: Juvenile Fantasy Stories From Nineteenth-Century America (1991) by Mark I. West
- Oz Behind the Iron Curtain: Aleksandr Volkov and His Magic Land Series (2019) by Erika Haber
- Tamawaca Folks: A Summer Comedy (1984) by John Estes Cooke
- Life with Aunt Ruth: An Interview with RPT's Nieces (1991) with Dorothy Curtiss Maryott and Janet Thompson Crews (co-interviewer Michael Gessel)