Young adult book about getting trapped in a game

[fawkes1989]

So, indont know the author or year, or title. It was a book about the main character, a young male, and his sister getting trapped in an Egyptian themed game whenever they played it. The game had to do with finding the pieces of Osiris and putting him back together. It's aimed at young adults, or even children and had a red bordered cover with the picture of a mummy on it. I read it long ago, and can barely remember it. I'm sure it real, and I just want to check, and possibly even read it again.