The original Magic Tree House series ceased with volume 28 and starting with volume 29, is continued with the series title The Magic Tree House, Merlin Missions. With the 25th anniversary re-prints of the Merlin Missions, the books have been separated into two separately numbered series, the original Magic Tree House (1-29) and The Magic Tree House, Merlin Missions series starting with #1.
Originally published as Magic Tree House #45.
"A Merlin mission."
"A Stepping Stone book."
"This edition is available for distribution through the school market."--P. [4] of cover.
Summary
The magic tree house whisks Jack and Annie to India during the Mogul Empire in the 1600s to search for an emerald needed to break a magic spell.