Over the Rainbow: The Life and Rhymes of Yip Harburg by Stuart Stotts was released in paperback in September 2015 by Big Valley Press. It is also available as a Kindle book.
On Aug. 6, 2015 the Huffington Post published "Lyricist Yip Harburg's Son Ernie: How My Dad Inspired Me to Become a Scientist" by Mike Sigman based on an essay by Ernie entitled "Yip and I."
The Yip Harburg Songbook. Piano/vocal sheets to 34 songs including "Over the Rainbow," "It's Only a Paper Moon," "April in Paris," "Lydia, the Tattooed Lady," "Brother, Can You Spare a Dime?" "Old Devil Moon," and an illustrated introductory essay by Stephen Holden. Hal Leonard Publishers, 2009.
Who Put the Rainbow in The Wizard of Oz? Yip Harburg, Lyricist. by Harold Meyerson and Ernie Harburg. 454 pages, black-and-white and color illustrations. University of Michigan Press, 1993. Paperback edition, 1995.
Harriet Alonso. Yip Harburg: Legendary Lyricist and Human Rights Activist. Wesleyan University Press, 2012. 305 pages, with illustrations. This interview-based biography is, in the author's words, "a study of the lyrical world of Yip Harburg, as told largely by Yip himself through interviews, speeches, song lyrics, and poems."
Rhymes for the Irreverent. Reissued January 2006 by the Freedom from Religion Foundation. This hardcover edition incorporates the 1965 and 1976 editions of the two books cited above, plus several newly discovered, previously unpublished poems. Seymour Chwast, who illustrated the original 1965 Rhymes for the Irreverent, created new pen-and-ink drawings for this edition.