Sara Pennypacker Books
Dumbstruck

This
was my first book. I thought it was out of print, but I
recently found some copies - they're only available here.
Ivy Greene's parents disappear after becoming "dumbstruck"
in a mysterious fog. To find them again, Ivy will need to
enlist the aid of her yodeling taxidermist aunt and her
pet ostrich, and a host of other nutballs... Ages 9-12.