Twirlybirch and the Volcano

In this second instalment of the Twirlybirch adventures, Beauregard and his little sister Sparkle Snowflake travel with Auntie Gertrude to the South Pacific. Auntie Gertrude's plan is rest and relaxation in a warm setting, but Beauregard has much more in mind.
Island hikes, swimming in warm water, and sandy beaches are all fine and dandy, but when Beauregard goes looking for more excitement, he bites off more than he can chew. Fortunately for him, he travels with his umbrella, and knows how to use it. But how will he deal with a volcano as well as smugglers?