How memory works: why you can be sure of something that never happened

Each time you remember something, your brain changes it a little, and you never feel the change. Follow one weekend away from the moment it happens to months later, and see how a memory gets in (encoding), where it lives (neurons and engrams), why it needs the hippocampus, what sleep does with it, then what happens each time you recall it, how false memories get in, where forgotten things go, and what makes a memory last.