Great projects, but the author is totally disorganised. The book itself doesn't contain parts lists aside from the pictures at the beginning of each set of instructions. Unfortunately, these don't always match the pieces you actually need once you start building according to those instructions. There are parts lists on the guy's website, but they don't match either and they even contain parts that don't exist. After sourcing all the required parts according to this guy's instructions, I don't have the pieces needed to build most of the models and do have one very very disappointed child.
If it wasn't such a drama working out what parts you need and what you can substitute for the non-existent fantasy parts it'd be 5 star. As it is though, it's a massive PITA. Thumbs down.