Authors and publishers who want full control over the code (HTML/CSS) of their e-book.
For a deep dive, many practitioners recommend the Sigil Witchery book by Laura Tempest Zakroff or Condensed Chaos by Phil Hine. 2. Software: Sigil E-book Editor Authors and publishers who want full control over
Sigil is an unofficial fifth episode for the original 1993 game Doom , created by its original designer, John Romero. created by its original designer