Tangential to ChapbookProcess, I wanted the little "Make current project" button in gvim to work for the book. Treat \t's as tab characters.

 all:
 \t./displaytex.pl frontmatter_source caeb_source collab_source bpb_source > test.tex
 \tpdflatex ./test.tex && pdflatex ./test.tex
 \tgpdf ./test.pdf