/lit/ - Literature

I'm blanking on the name of this sci fi book I read years ago. It's driving me nuts.

Pic related is the cover, as best as I can remember it. There's a porthole with an alien eye, and maybe the silhouette of a human astronaut at the bottom. The title was in big letters, and although it wasn't "xenocide" I think it did have something to do with "genocide" or some similar word.

The plot had humans, who were allied with friendly four legged aliens. Then there was another race of aliens that wasn't friendly, they had long hair with "memory fruits" growing underneath the hair that they could eat to see memories. There was a planet close to theirs that had been destroyed by war, I think part of the plot was about what happened to this destroyed neighbor planet.

For what it's worth, I think the book was in the young adult sci fi section of my library, although I'm not sure it was actually a YA book.