Michelle - I am guessing this is a random house book? There is an html program that "links" the htmls together but it's kind of a pain because because you have to order the html files and sometimes, with those random house books, it's difficult to do. The better solution may be to downconvert the lit file and then use Book Designer to go from the downconverted lit to rtf.
Book designer is confusing for me so maybe someone will do step by step instructions for us.