Published by Oyez Books. Middle-grade book suitable for ages 9-13.
In ‘The Door Under the Stairs’ series Joe, Hanna and Emil discover a mysterious door under the stairs at their school which takes them back in time where they meet various Malaysian heroes and help them solve mysteries related to the history of Malaysia. There are eight books in this middle grade series.

In this fifth adventure, the three friends travelled all the way back to 1848 and met Long Jaafar and his son, Ngah Ibrahim during the time when tin was first discovered in the Kinta Valley. This time, the three friends discover that a mysterious person was determined to change history. Will they be able to stop them?