Hi, Nancy,
The late Johnny Becnel of Louisiana had a lot of experience with grafting citrus trees; he swore for roses on Fortuniana: doing an inverted T graft as the best way to get good connection between the scion and the host. He also believed that the plant should be left without moisture for seven to ten days after the graft.
Jim Mills up in Mississippi does cleft grafts onto Fortuniana with great success.

There are no books specific to rose grafting on fortuniana. Most plant propagation books will have both of the above 'grafts' in them (the first is called budding, if we're being specific, the latter is grafting.)

Another resource is google books, using their advanced search engine, key words: plant grafting budding (or cleft grafting) and the restriction "Full Text". Those are free for you to enjoy.

Using the link below you can further restrict it to roses (or books with propagating roses). But the basic books there are good intros.)

Here is a link that might be useful: Several hundred books on plant propagation

Steve Singer of Wisconsin Roses offers a budding/grafting video on his website for $25. I've seen it and it's one of the best grafting explainations I've seen with great closeup and step by step instructions. Although grafting is done on multiflora seedlings, the same method can be used for fortuniana.
The link will bring up the catalog. Scroll down almost to the bottom to view the listing for the video.

Here is a link that might be useful: Wisconsin Roses catalog with grafting video listing.