Spiderwick Chronicles The Nixie's Song

This book is the sixth book in the Spiderwick chronicles. This book is about a boy named Nick Vargas that has one brother(Julian Vargas) and now a new step sister(Laurie Vargas). They have just moved in together. Nick is not so happy about it because instead of having his own room he has to share a room with his brother Julian, because Laurie has to take his room. One day they go exploring they find a giant. It chases them for a while. Then they go to this book thing about the three kids that first discovered the mystical creatures. They get an address of a giant hunter. They go there to see if they can get some help from him because the giant breaths fire and is becoming a bog problem.When they get there something is not right. Thats it because i don't want to spoil it.