The landing page is mostly filled with sci-fi. I know it's what's popular on the site and what's reviewed recently but it's sending the wrong message that the site is exclusively for sci-fi. Most readers don't read sci-fi, and readers who read sci-fi tend to mostly read sci-fi, so the average reader would think the site is not for them.

In harsher words: women don't read sci-fi, and are your target audience. Make sure your landing page surfaces things other than sci-fi and fantasy, or you'll never grow past that niche.