Conversation so far:
what did esther do in Esther Williams's later years?
In April 2010, Williams appeared at the first Turner Classic Movies Classic Film Festival in Hollywood, California, alongside two-time co-star Betty Garrett.
what movie did she star in with betty?
Their film Neptune's Daughter (1949) was screened at the pool of the Roosevelt Hotel.
what else did she do in her later years?
She continued to lend her name to a line of retro women's swimwear.
.
how successful was the swimwear line?
CANNOTANSWER.
what kind of fabric was used for it?
CANNOTANSWER.
anything else interesting about her later years?
In 2000 an account of Williams's life and career appeared in the Swedish book Esther Williams -- Skenbiografin (Esther Williams -- The Fake Biography.

Question: why was it called "the fake biography"?
Self-contained rewrite: why was the book Esther Williams called "the fake biography"?