i believe the north american rock garden society has a website (that you can locate using a search engine like google) with lots of pictures and links to other on-line resources. imho the key to aesthetic and horticultural success is finding good speciman rocks and making sure you have good (excellent) drainage thru proper siting (generally on a slope, hill, or mound (natural or one you create), or container if you are creating a trough garden and a soil mix made up of the right mixture of gravel, sand, dirt, and soil/organics for the plants you are growing. mix all or some of the above together with properly selected and installed plants and with luck and time you will have something that you will enjoy for years to come. good luck!!!

NARGS.org

Here is a link that might be useful: North American Rock Garden Society