I'm an architect and have been focusing on sop modeling for architectural projects… i bought the book “the magic of houdini” to further my understanding of houdini… Now i would like to explore more on the SOPs modeling potential, wonder if anyone knows any tutorials or books that focus on the SOP modeling aspect? the following are some of the architects works i would like to achieve in houdini:

http://www.pushpullbar.com/forums/showthread.php?t=5636 [pushpullbar.com]
http://www.tropolism.com/2007/02/more_zaha_craziness.php#more [tropolism.com]

many thanks.

Though not SOP specific, maybe this will provide the type of information you're looking for
http//www.cmivfx.com/product_houdini_cities.asp

Philip