The Lightning Thief

I'm not really far in this book, but what I can say about it is that the first thing it says is "I didn't want to be a half-blood." First, I'm thinking to myself, "What in the heck is a half-blood?" Is a half-blood like half human and half another creature? The book is a really good book, but when they start talking about mythology it's a little confusing. When I read this book I'm always wondering things. For example, "what does this word mean? Or, "How do I pronounce these unusual names?" I would rate this book an 8 because I'm not far in the book, so I don't know much about it yet.