psbook

From the man page: ... Psbook rearranges pages from a PostScript document into ``signatures'' for printing books or booklets, creating a new PostScript file. The input PostScript file should follow the Adobe Document Structuring Con- ventions. The -s option selects the size of signature which will be used. The signature size is the number of sides which will be folded and bound together; the number given should be a multiple of four. The default is to use one signature for the whole file. Extra blank sides will be added if the file does not contain a multiple of four pages.