End pages

Currently the end of my book includes a colophon. Is there any way to 
tell the DocBook XSL stylesheets to put additional material onto that 
page such as an "About the Author" section (taken from a personblurb) or 
  some additional custom content?

-- 
Elliotte Rusty Harold  
Java I/O 2nd Edition Just Published!
http://www.cafeaulait.org/books/javaio2/
http://www.amazon.com/exec/obidos/ISBN=0596527500/ref=nosim/cafeaulaitA/