Suitable for ages 8 upwards, The Mystery of Heron Island is the first in the William and Selma thriller series. All summer term, William & Selma have been looking forward to their holiday on Heron Island but soon after arriving, the island is rocked by a spate of burglaries. Who is doing this and why? At huge risk to themselves, William and Selma investigate and uncover the Mystery Of Heron Island.