As salaamu alykum.
Below are the names of some Publishing Houses, book distributors, etc. that generally carry a large selection of materials in accord with Islam as it has traditionally been understood over the past 14 centuries and a minimum, if any, outright objectionable material.
http://turath.co.uk/ [Turath Publishing's Website]
Please support these institutions and if you have some money to spend and don't know what to spend it on, browse through these websites and you'll be sure to, insha'allah, run into a valuable work from which you can benefit.
If anybody knows of any other booksellers that they'd like to add to the list above, please do so.
I will make this thread a "sticky" insha'allah.