Question: Which stories is the musical, in which Stephen Flaherty was nominated eight Tony Awards for, based on?

Context articles: Glenn Slater
Oscar Hammerstein II
Stephen Sondheim
Yuki Shimoda
Onna White
Chita Rivera: The Dancer's Life
Seussical
Stephen Flaherty
Lynn Ahrens
Maja Lidia Kossakowska

Glenn Slater (born 1968) is an American lyricist who collaborates with Alan Menken and other musical theatre composers.
 He was nominated for the Tony Award for Best Original Score for the Broadway version of "The Little Mermaid" at the 62nd Tony Awards in 2008, his second Tony nomination for "Sister Act" at the 65th Tony Awards in 2011, and his third Tony nomination for "School of Rock" at the 70th Tony Awards in 2016.
Oscar Greeley Clendenning Hammerstein II ( ; July 12, 1895 – August 23, 1960) was an American librettist, theatrical producer, and (usually uncredited) theatre director of musicals for almost forty years.
 Hammerstein won eight Tony Awards and two Academy Awards for Best Original Song.
 Many of his songs are standard repertoire for vocalist's and jazz musicians.
 He co-wrote 850 songs.
 Hammerstein was the lyricist and playwright in his partnerships; his collaborators wrote the music.
 Hammerstein collaborated with numerous composers, such as Jerome Kern, with whom he wrote "Show Boat", Vincent Youmans, Rudolf Friml, Richard A. Whiting and Sigmund Romberg; but he is best known for his collaborations with Richard Rodgers, as the duo Rodgers and Hammerstein which include "Oklahoma!
", "Carousel", "South Pacific", "The King and I", and "The Sound of Music".
Stephen Joshua Sondheim ( ; born March 22, 1930) is an American composer and lyricist known for more than a half-century of contributions to musical theatre.
 Sondheim has received an Academy Award, eight Tony Awards (more than any other composer, including a Special Tony Award for Lifetime Achievement in the Theatre), eight Grammy Awards, a Pulitzer Prize, a Laurence Olivier Award, and a 2015 Presidential Medal of Freedom.
 He has been described by Frank Rich of "The New York Times" as "now the greatest and perhaps best-known artist in the American musical theater."
 His best-known works as composer and lyricist include "A Funny Thing Happened on the Way to the Forum", "Company", "Follies", "A Little Night Music", "Pacific Overtures", "", "Merrily We Roll Along", "Sunday in the Park with George", "Into the Woods", "Assassins", and "Passion".
 He also wrote the lyrics for "West Side Story" and "Gypsy".
Yuki Shimoda (August 10, 1921 – May 21, 1981) was an American actor best known for his starring role as Ko Wakatsuki in the NBC movie of the week, "Farewell to Manzanar" in 1976.
 He also co-starred in a 1960s television series, "Johnny Midnight" (39 episodes), with Edmond O'Brien.
 He was a star of the silver screen, early television and the stage.
 His Broadway theater stage credits include "Auntie Mame" with Rosalind Russell, nominated for eight Tony Awards and winner of three Tonys, and "Pacific Overtures", a Stephen Sondheim Broadway musical directed by Harold Prince nominated for ten Tony Awards.
Onna White (March 24, 1922 – April 8, 2005) was a Canadian choreographer and dancer, nominated for eight Tony Awards.
Chita Rivera: The Dancer's Life is a musical revue based on the life of Chita Rivera, with a book by Terrence McNally and new songs by Stephen Flaherty and Lynn Ahrens as well as songs from various other composers.
 It earned Rivera her ninth Tony Award nomination (for Best Actress in a Musical).
Seussical is a musical by Lynn Ahrens and Stephen Flaherty based on the stories of Dr. Seuss (mainly "Horton Hears a Who!
", "Horton Hatches the Egg" and "Miss Gertrude McFuzz") that debuted on Broadway in 2000.
 The play's story is a complex amalgamation of many of Seuss's most famous books.
 After a Broadway run, the production spawned two US national tours and a UK tour.
 It has become a beloved classic for schools, communities, and regional theatres.
Stephen Flaherty (born September 18, 1960) is an American composer of musical theatre.
 He works most often in collaboration with the lyricist/bookwriter Lynn Ahrens.
 They are best known for writing the Broadway musicals "Once on This Island", which was nominated for eight Tony Awards, "Seussical", which was nominated for the Grammy Award, and "Ragtime", which was nominated for twelve Tony Awards and won Best Original Score.
 Flaherty was also nominated for two Academy Awards and two Golden Globe Awards with Lynn Ahrens for his songs and song score for the animated film musical "Anastasia".
Lynn Ahrens (born October 1, 1948) is an American writer and lyricist for the musical theatre, television and film.
 She has collaborated with Stephen Flaherty for many years.
 She won the Tony Award, Drama Desk Award, and Outer Critics Circle Award for the Broadway musical "Ragtime".
 Together with Flaherty, they have written many musicals, including "Lucky Stiff", "Once on This Island", "My Favorite Year", "Ragtime", "Seussical", "A Man of No Importance", "Dessa Rose", "The Glorious Ones", and most recently seen on Broadway, "Rocky the Musical".
Maja Lidia Kossakowska (1972) is a Polish fantasy writer, archeologist and journalist.
 She was first published in 1997.
 She was nominated eight times for the Janusz A. Zajdel Award for her short stories and novels, and received it in 2007 for the short story "Smok tańczy dla Chung Fonga".
 She has also received several other awards.
 She is best known for using angel themes in her work.
 She is the author of five books and many short stories.