I liked it.  This is the first book in this series that I read, and one thing I liked right off is though it is book five in the series, it provided enough background about characters and previous events that I was able to pick up in the middle and understand just fine.  Elementary school kids often pick up series books in the middle, and it’s good if reading them in order isn’t too important.  This one recounts the adventures the Spence Mansion trio face when their heads get turned by Hollywood promises and sign dastardly contracts with a producer who wants to butcher their story as he makes his own film.  The characters are fun. The writing is witty.  The illustrations are mixed with letters in a format that makes the book not too intimidating for reluctant/young readers.