Title of book plz help!!?

Question: Title of book plz help!!!?

ok well i read it in like 4th grade!. all i member was there were two brothers and a lil sis!. they went and visited their aunt or something!. then they went to this cave where they found a 3 headed dragon!.!. plz its bugged me for years!.!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

the Dragon of Lonely Island i think
its by rebecca ruppWww@QuestionHome@Com