Avatar penpals
Summary: When he's taken to the Spirit World during the Solstice, Sokka receives a mysterious gift from a spirit. At Avatar Roku's temple Zuko receives the counterpart and they begin a secret correspondence.
Pairings: Zuko/Sokka, Aang/Katara
Prologue
"Sokka!" Katara cried as her brother emerged from the bamboo field left by the Hei Bai spirit.
She ran over to him and gave him a hug.
"What happened?" he asked confused.
"You were trapped in the Spirit World for twenty-four hours," his sister explained. "How are you feeling?"
"Like I seriously need to use the bathroom."
He took off, looking for some privacy. He found a small section of bushes and quickly relieved his full bladder. As he made his way back to the others, he felt something solid in his back pocket, something he was sure hadn't been there before. With a frown, he reached back and pulled out a slim leather bound book.
It wasn't overly big, maybe two hands long and one across. The cover had a strange swirling design on it, that could almost pass for a really decorative cloud. He flipped it open, only to find that all the pages were entirely blank. It was a journal of some sort, but how, and where did he get it?
He brushed it off for now as he slipped the journal inside his shirt. He'd figure it out later. Or maybe he'd give it to Katara. Girls liked that kind of thing, didn't they?