Then when we list the contents of the 'out' directory ...
$ ls out lily-2f978e1e5c-1.eps lily-2f978e1e5c.txt lily-2f978e1e5c-systems.count snippet-map--1412806531.ly lily-2f978e1e5c-systems.tex snippet-names--1412806531
lily-2f978e1e5c-systems.texi test.dep lily-2f978e1e5c.eps test.tex lily-2f978e1e5c.ly tmpb1LEdT.aux
But no test.psfonts.
Am I doing something wrong?
(FWIW, it looks like passing the --pdf option to lilypond-book works fine, as described in 4.4 Invoking lilypond-book; but I haven't tested to make sure that all the printing details are coming out correctly.)