Based on a traditional fairy tale. The hungry troll must be defeated before the three billy goats Gruff may cross the bridge to the grass on the other side. You should read it with One of Ladybird's most popular series is Ladybird. It has aided young children beginning to read grow and enhance their reading abilities for more than 35 years. Each Read it yourself book is meticulously crafted to contain a large number of important, high-frequency words that are essential for learning to read, as well as a small number of tale words that are introduced and practiced throughout.