The first chapter of the book is online and features things like random folks who barely knew him in high school calling him a "cry baby". I'm sure that you could probably find similar garbage out about anyone who wasn't the school bully.
The story about Jobs cheating Woz over their first deal with Atari (over "Breakout") is also in the first chapter -- I've come across it elsewhere, probably in one of Levy's books ("Insanely Great" or "Hackers", I'm don't remember which) except pretty much every detail is different (when it happened, how much money was involved, and how long the resulting estrangement was). It makes me wonder if the story is true at all.
Unauthorized biographies always suffer from a lack of access to key people (i.e. the subject of the biography and the people nearest and dearest to him or her). This one has a title that paints Jobs is dishonest ... not a good start.
"Hard Drive" (the first Gates biography) was also unauthorized, and said plenty of really nasty things about Gates (basically painting him as a borderline crooked businessman who deliberately sabotaged rivals' products and bought favorable verdicts in key court decisions that would have -- it is implied justly -- seriously damaged Microsoft), but the title simply implied he was a driven man -- something no-one would deny.