Sing's sequel will be released in 2019.
 It is an alternative account of, and an informal sequel to, the events of J
 Heidi Grows Up: A Sequel to Heidi) is a 1938 novel and sequel to Johanna Spyri's 1881 novel Heidi, written by Spyri's French and English translator, Charles Tritten, after a three-decade long period of pondering what to write, since Spyri's death gave no sequel of her own

