Forum:Book in between TNP and TeaPoT- Possible Plot

OK, In The Sight it mentions a possiblity that there may be a book in between TNP and TeaPot.

The Sight, pg. 190 "Sometimes I dream about when I was very small, traveling through the snow," he [Jaypaw] confessed. "Is that right? That wasn't the Great Journey, was it?" Tension crackled through Leafpool's fur. "No, the Great Journey was long befor you were born. But your... your mother did make a long journey with you through the snow when you were very small. You were born outside the hallow, and she had to wait until you were all strong enough to travel."

-Lightstream