John Nesbit Series by Perry Nodelman

Young John Nesbit enters the world of the Strangers in order to rescue his baby sister whom the fairies have replaced with a Changeling.

Why is John Nesbit trapped in the bottle?Johnny Nesbit knows all about the Strangers -- the fairies who stole his baby sister a year ago. He knows they must be involved when he wakes up in a pink bedroom, in a strange house, within a glass bottle -- being held by his former classmate Cheryl Zennor. The new, pint-sized Johnny must once again risk his life to combat the Strangers, get himself and Cheryl home, and rescue the small army of green-skinned children for whom Cheryl cares... moreWhy is John Nesbit trapped in the bottle?Johnny Nesbit knows all about the Strangers -- the fairies who stole his baby sister a year ago. He knows they must be involved when he wakes up in a pink bedroom, in a strange house, within a glass bottle -- being held by his former classmate Cheryl Zennor. The new, pint-sized Johnny must once again risk his life to combat the Strangers, get himself and Cheryl home, and rescue the small army of green-skinned children for whom Cheryl cares. And Johnny knows that things are never as easy as they seem when the Strangers are involved. less