We are all affected by our memories. Memories can be tied to smells, places, and people. But what if you had someone else's memories? Would that change who you are? In The Host, both Wanda has to deal with a big memory mix-up. Initially, she's supposed to use Melanie's memories to lead the Seeker to the surviving humans. The problem? Melanie's memories are so strong, Wanda develops an intense attachment to the people in them, driving her motivation for the rest of the book. That's some pretty powerful stuff.