20,000 Leagues Under the Seas (2nd version)

But in the 1860s France had to treat the Tsar as an ally, and Verne's publisher Pierre Hetzel pronounced the book unprintable. Verne reworked its political content, devising new nationalities for Nemo and his great enemy--information revealed only in a later novel, The Mysterious Island (1875); in the present work Nemo's background remains a dark secret. In all, the novel had a difficult gestation. Verne and Hetzel were in constant conflict and the book went through multiple drafts, struggles reflected in its several working titles over the period 1865-69: early on, it was variously called Voyage Under the Waters, Twenty-five Thousand Leagues Under the Waters, Twenty Thousand Leagues Under the Waters, and A Thousand Leagues Under the Ocea