which was the breakthrough work of the above composer?
Musical adaptation of Kurt Vonnegut's novel "God Bless You, Mr. Rosewater"
Alan Menken
Menken finally achieved success as a composer when playwright Howard Ashman chose him and Engel to write the music for his musical adaptation of Kurt Vonnegut's novel "God Bless You, Mr. Rosewater". 
when did beaty and the beast come out September 29, 1991 who had rewritten its script? Linda Woolverton and who composed its music? Alan Menken can you name its cast? Robby Benson and Paige O'Hara
wiki:7476885
Alan Menken [SEP] Breakthrough years
Menken finally achieved success as a composer when playwright Howard Ashman chose him and Engel to write the music for his musical adaptation of Kurt Vonnegut's novel "God Bless You, Mr. Rosewater". The musical opened in 1979 at the WPA Theater to excellent reviews and modest box office. It transferred after several months to the Off-Broadway Entermedia Theater, where it ran for an additional six weeks. Menken and Ashman wrote their next musical, "Little Shop of Horrors", for a cast of only 9 performers, including a puppeteer. This musical is based on the 1960 black comedy film "The Little Shop of Horrors".