Who's Your Mummy? was the sixth book in the Goosebumps HorrorLand book series. It was preceded by Dr. Maniac vs. Robby Schwartz and followed by My Friends Call Me Monster.
It was released in Janury 2009 and was 133 pages long.
Plot
Abby Martin is very worried about Granny Vee. She is very sick and IS NOT getting any better. That is why Granny Vee sent Abby and her little brother Peter Martin to their Uncle Jonathan's house. It is weird that the house looks like an Egyption tomb or something. Abby and Peter are even wondering, if there are any mummies in this house. The answer is yes and they are waking up!