CTAN has a new package: pdfbook

[FTP archive maintainer]

A new package has been installed at tug.ctan.org and should soon make its way
to your favorite mirror.

Thanks for the upload,
Jim Hefferon

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The following information was provided by the package's contributor.

Name of contribution: pdfbook
Author's name: Jaap Eldering
Location on CTAN: /support/pdfbook
Summary description: Rearrange pages for booklet printing
License type: gpl

Announcement text given by the package's contributor:
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Rearrange pages in a PDF file into signatures and (optionally) rescale to 
fit 2 original pages on 1 physical one. Allows one to easily convert pdf 
documents to booklet format, e.g. transform from A4 paper to A5 pages on 
A4 paper, such that one can fold the pages and obtains a small booklet.
- - ----------------------------------------------------------------------

See this package at 
  http://tug.ctan.org/tex-archive/support/pdfbook 
.  You may get a better network connection by using a CTAN mirror
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Please join a users group; see http://www.tug.org/usergroups.html .