Set toc: listing book titles only (fo)

[Donna Robinson <donna@terpsichore.ws>]

Hi,

I've been trying (without success) to generate a set-level toc listing 
comprising only book-titles (rather than the whole shebang).

I found this in the archives:
  http://lists.oasis-open.org/archives/docbook-apps/200404/msg00030.html
but unfortunately it's not much help wrt fo output.

Is this a relatively simple thing to do?

Donna