Wallace has her own Gillard biography coming out next year, a fact she discloses in the Monthly review. This is the usual let-the-readers-decide solution to apparent conflicts of interest.
While [Monthly editor Ben] Naparstek said Wallace had clearly identified herself as the author of a rival biography, Mr Ball [the Penguin publisher] said that was “like a mugger declaring his profession when you first meet”.
“It doesn’t explain away the absolute stink-to-high-heaven conflict of interest in getting one biographer to review another. What kind of intellectual contortion must he have gone through to come up with that?”