Diane,
If I understand correctly, you did not move the book components, but only the book file itself. If so, there may be an easy correction. If two files are on the same drive, FrameMaker stores any relationship between them as a relative path. In particular, a book file uses relative pathnames to identify its book components (cross-references between files and text insets are stored the same way). Thus, if all the related files are in difference subdirectories within one directory, you can move the parent directory and all the connections will still work.
If you want to move one file, though, there are two ways to do it. You can use a Windows technique such as dragging it from one Windows Explorer window to another, or you can use FrameMaker. If you use a Windows technique, the FrameMaker file is not changed and any links it contains will therefore be broken. However, if you use File > Save As to save the book from within FrameMaker, FrameMaker creates a new file with new links, pointing back to the original book components.
If you moved the book with Windows, therefore, you might be able to move it (still with Windows) back to the original location, open it, and then use Save As to save it in the new location. Once you've confirmed that you have the desired result, you can delete the original file.
--Lynne