This book is for those hobbyists that really just started out and have no clue what they are doing. I like to call them "fish killers." If you have successfully kept a single goldfish then you might not need this childrens book. The one thing I will say about this book though is it is easy to comprehend, which goes without saying seeing as it was written by someone with the mental wits of a four-year-old. Leave it alone.