With the Light (Hikari to Tomo ni) is a manga about a Japanese mother trying to raise her autistic son, Hikaru. I just spent two and a half hours at Borders reading the first volume-- it's quite long (the first "volume" is about two and a half inches thick O_o), but it's a great read. I'm planning on going back in a few days to read the second volume.
So I was just wondering if anyone else has read it. If not, check it out. It's very moving. It's something a little different from the usual manga fare-- honestly, I wouldn't have expected something like that to even get published in the US.