Facebook Ads: Converting clicks to purchases of Sci Fi book with starred kirkus review. Hi, 

I've been testing ads on Facebook. Through testing various creatives and audiences, I now have a high click through rate (9%) and relevancy of 9, but still have very low conversion rate to book sales on those clicks. 

I think I need to further narrow audience to people who actually read Sci Fi. 

Any suggestions on which behaviors&amp;interests I can test to further increase conversions? 

Cheers,

Alfie 