Finding Artists in Library Resources
In general, looking at recent exhibition catalogues that are about different aspects of your topic might yield some new to you artists. Remember to add "exhibitions" to your search!
There are a few series of books by Phaidon that list critically acclaimed emerging artists, the Vitamin series and the Cream series. See these books below.
In general however, emerging artists are not going to be often represented within books. It's advisable to develop multiple strategies for finding artists for your show.