I don't know what the practice room is, never been in there. But I can tell you it opens with two doors on redoran council hall. Look there.
Secondly, if you pick up a book and then try to put it down, you cannot get it to be standing unless you use the
bookrotate plugin. Too bad you must mess around a bit with tesame because skill books have a problem with scripts. Instructions are provided in the plugin. Nice to have your books in order, though.
Sermon #29 is only in the locations I gave you. No other cell listed in the editor, unless you want to count the all_items_beta_testing rooms left in there, or you want to trust your luck and wait for the book to spawn with the random_skill_book script which is used by some locations.