“Psychedelic Rock as Linchpin of Rock Music Evolution.” Nas Trilhas do Rock: Psychedelia and Anglo-American Underground, ed. Jose Adriano Fenerick. Appris Editora, in preparation (scheduled for publication 2025).

“Diversity and Unity in ELP’s Trilogy.” The Cambridge Companion to Prog Rock, ed. John Covach. Cambridge University Press, in preparation (scheduled for publication in 2025).

“Art Rock.” The Encyclopedia of Popular Music of the World, Genres, Volume Thirteen: Genres, International, ed. John Shepherd, David Horn, Dave Laing, Paul Oliver, and Peter Wicke. Continuum International, in preparation (scheduled for publication in 2025).

“‘A Certain Unease in the Air’: Transitional Aspects of Pink Floyd’s Animals.” Tear Down the Wall: An Interdisciplinary Interrogation of the Music and Significance of Pink Floyd, ed. Chris Hart and Simon A. Morrison. Routledge, 2022.

“The Progressive Rock Style: The Music,” translated by Goto Masayuki with Namba Hiroyuki and Araksuka Kentaro. The Seijo University Arts and Literature Quarterly no. 247 (April 2019), 47-92. [Japanese translation of chapter 2 of Rocking the Classics.]

“Progressive Rock.” The Encyclopedia of Popular Music of the World, Volume Eleven: Genres, Europe, ed. Paolo Prato and David Horn, 83-90. London/New York: Continuum International, 2017.

“The Music’s Not All That Matters, After All: British Progressive Rock as Social Text.” History of Social Protest in Popular Music, ed. Jonathan Friedman, 123-141.Routledge, 2013.

“Album-Oriented Rock.” The Encyclopedia of Popular Music of the World, Volume Eight: Genres, North America, ed. John Shepherd and David Horn, 17-19. London/New York: Continuum International, 2012.

“Die Geschicte des Progressive Rock: Großbritannien, 1969-1971,” translated to German by Julia Vetter, Eclipsed 130 (May 2011), 38-41.

“The Beatles and the Origins of Britishness in Rock Music.” Fifty Years with the Beatles: the Impact of the Beatles on Contemporary Culture, ed. Jerzy Jarniewicz and Alina Kwiatkowska, 107-130.University of Lodz Press, 2010.

“Bring the Balance Back: Led Zeppelin and the Hegelian Dialectic.” Philosophy and Led Zeppelin: All Will Be Revealed, ed. Scott Calef, 187-218. Open Court, 2009.

“Emerson, Lake and Palmer: Brain Salad Surgery,” translated by Andrés Valle with Sergio Moscatelli and Juan Tambussi. Mellotron 36 (November 2007), 33-50. [Spanish translation of chapter 9 of Endless Enigma.]

“Theodor Adorno, Pink Floyd, and the Psychedelics of Alienation.” Philosophy and Pink Floyd: Careful with that Axiom, Eugene, ed. George Reisch, 95-119. Open Court, 2007.

Endless Enigma: A Musical Biography of Emerson, Lake and Palmer. Open Court, 2006. 2007 Award for Best Research (History) in Recorded Rock Music, ARSC.

“Concerning the Politics of Prog: A Reply to Chris Matthew Sciabarra’s ‘Rand, Rush, and Rock.’” The Journal of Ayn Rand Studies vol. 5, no. 1 (Fall 2003), 173-188.

Progresywny urock, translated Maciej Majchrzak. Toruń, Poland: C & T, 2001. [Polish translation of Rocking the Classics.]

Book Review: Nick Bromell, Tomorrow Never Knows: Rock and Psychedelics in the 1960s; Michael Hicks, Sixties Rock: Garage, Psychedelic, and Other Satisfactions. MLA Notes 58/1 (September 2001).

Book Review: Alain Frogley, ed., Vaughan Williams Studies. Current Musicology 63 (1999), 102-115.

“Sgt. Peppers el origin del progresivo,” translated by Andrés Valle. Mellotron 20 (June 1998), 5-11. [Spanish translation of chapter 1 of Rocking the Classics.]

Rocking the Classics: English Progressive Rock and the Counterculture. Oxford University Press, 1997. Oxford Scholarship Online. Oxford University Press, October 2011. DOI:10.1093/acprof:oso/9780195098884.001.0001.

“Holst’s “Mars”: a Model of Goal-Oriented Bitonality.” Music in Performance and Society: Essays in Honor of Roland Jackson, 411-22. Harmonie Park Press, 1997.

“’Block Juxtapositions’ as a Structural Principle in the Music of Gustav Holst and Ralph Vaughan Williams,” British Music 15 (1993), 84-104.

“The Spirit of Albion in 20th-Century English Popular Music: Vaughan Williams, Holst, and the Progressive Rock Movement.” Music Review 53 (May 1992), 100-125.