Special / themed issues can be a great way of focusing attention on a hot topic.  A good special issue can enhance the profile of your journal, attract top authors and potentially boost usage and citations.  Many editors arrange for a guest editor to handle the entire issue on their behalf.  This allows for a specialist to oversee the issue and bring in their contacts and networks. 

The goal of running special issues is to provide a coherent outlet for high quality research in a coherent thematic area of topical or practical significance. Periodically, Pezzottaite Journals will put out a call for proposals for special issues. As well, individual academics or teams of academics may wish to put forward a proposal to the Editor-In-Chief.