There are two books so far
One Block Wonders - Maxine Rosenthal
One Block Wonders Encore - this is the one with the hollow cubes in.
There is a new book out in April with new variations on the hollow cubes, One Block Wonders Cubed, which would be a good addition for doing the cubes too.
http://www.amazon.ca/One-Block-Wonde.../dp/1571208348