I'm trying to put lots of scores in a \book, and I want the output such that no score is split between two pages. I don't care if a page ends up half-full because the next score is too long to fit on the bottom of the page, but requiring my musicians to turn pages is, in this case, bad.
For the most part, the scores I'm doing are only 4 line long, and I can easily get 2 on a page, but right now lilypond is sometimes wanting to put the header and one line on the bottom of one page under another piece or two, and then the remainder on the next page, and this condition simply propagates through the book.
I've tried adding \score { \pageBreak } between scores where I know pagebreaks should fall, but it doesn't seem to do anything.