Planar Heroes

From publisher blurb:

Planar Heroes provides a focused and specific selection of class options for a particular purpose and style of campaign, ensuring that you pay only for material likely to be useful in your game. Planar Heroes explores one of the many facets of otherworldly travel. Whether you intend to send your player characters gallivanting across the myriad worlds, or whether you're bringing outside and alien characters to them, Planar Heroes provides the tools you need to make such characters exciting and new!