I’ve just had a quick look, Ruth.
What I’ve learned from my time on the IFLA Section Standing Committee for School Libraries is that there is a wide gap between university colleagues in the US who are writing for school librarians and those writing for academic librarians. The authors do not appear to have a school focus, which, in my opinion, limits the value of the book, especially if you are pressed for time.
Although not free, for my money I have found Information Literacy and Information Skills Instruction: New Directions for School Libraries to be a good investment.
Darryl