I see lots of books that have been previously given an unauthorized tape treatment, sigh. In fact, most of the time, tape will probably make the situation much worse then if it had been left alone. Also, although there are products out there called things like "book tape" and "repair tape" and even "archival book repair tape," none of them are actually good solutions.
Nonetheless, here are a couple before-and-after examples of books where I had to remove a lot of tape. It's tricky and tedious, but it can be done.