Answer by Cristina Hartmann, Lawyer by day, writer by night.
This is an interesting question which requires a two-fold analysis. First, what's the gender breakdown for the Hunger Games readership? Second, what aspects appeal to which gender?
The gender breakdown of the actual readership leans female.
My scavenger hunt throughout the Internet didn't turn up much. But! That won't stop me from eking some insights from the little information that we have.
Anecdotal evidence points towards a strong female readership. Most of the Quora members active on the Hunger Games topic are female. The same is true for other online Hunger Games forums -- mostly female. This evidence is far from conclusive. Females could simply be more active and vocal readers.
Then again, males do read less than females, especially during the teenage years. These two pieces of evidence point towards a primarily female readership, but probably not overwhelmingly female.
Readership isn't the primary determinant of appeal, so let's look at the themes.
Hunger Games themes appeal equally to males and females
I'll have to resort to stereotypes here. No reader, male or female, is created equal. That being said, there are certain themes that appeal more to one gender than the other. Call it nature or nuture. The fact remains that some genres have skewed gender balances.
Themes that appeal to primarily female readership:
Themes that appeal to males readers include:
This seems to pose a conundrum. The series appeals to males and females equally, yet the readership is primarily female. This can't be! Well, as I said, readership isn't the end all of appeal. There are many reasons why males may shy away from the series: lack of interest in reading, YA label, or the female protagonist.
If you're a dude, you may want to give this a try.
 - Despite the fact that people prefer protagonists of the same gender, women are more flexible in their gender preferences. My theory is that male protagonists dominate the storytelling tradition, so women grow up with a higher exposure to cross-gender protagonists than men do.
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