Proxies. You can't shim in the Proxy object. Ain't no hipster feature there.

You can't even transpile it without massively different output from the transpiler, which is a bit bad.

It did start out as a YA book. Only, halfway through, RAH realized that he wanted to publish to a more mature audience. The first third of SiaSL hearkens back to his YA beginnings; the rest of it appeals to the rebellious. That book cemented my enjoyment of the rest of his writings because I bridged from child to adolescent at the time of reading.