Lulu is a very popular print-on-demand system. There are currently 3 Delphi books published on it:

• The Tomes of Delphi: Algorithms and Data Structures by Julian Bucknall at $25.00 (a very nice book, a classic of which I own an authographed copy)
  
• ReportBuilder Developer's Guide, 3rd Edition by Digital Metaphors Corporation at $30.00 (a product user guide)
  
• The ECO-III Book by Alois Schmid at $42.65 (a brand new book, written specifically for lulu)

I've been thinking of publishing on Lulu for some time, but having seen the current status of my published books, I'm now resolved to make a couple of experiments, before deciding what to do with my next mayor book. In this post of Nick Hodges on Julian's book on Lulu, I was referenced indirectly twice: once by Nick ("What I really hope is that one of those authors with a really fat book will choose to use lulu instead of the traditional publishing houses for their next edition."); once by Kent Morwath ("I'd like to see books like "The Delphi Developer's Handbook" made availabe this way.").

Rather than reprinting an old book (DDH was written in Delphi 2 days...), I though about taking some of the material and revising it for a newer version of Delphi. There are two different books that might come out of this effort, one on writing VCL components, the other on advanced Win32 API programming topics. However, I currently have other material I can run into a book, including OOP techniques, patterns, Web 2.0 and AJAX, as well as publish some of my introductory books for Delphi newcomers.

Before deciding, I thought it would be a good idea to run a poll, asking you which topics you'd like best. So I've spent a couple of hours to finish some polling support for this site (I had an earlier version for another site, never published, so this is more or less a "second beta version"), and made a poll available. Beside providing comments to this post as usual, I ask you to VOTE A BOOK TOPIC or suggest one. You can check the current votes here.