Almost be definition, if a book is by a classic, anyone can do an abrdigements since the copyright is expired. Abridgements of Shakespeare (and other classics) were very common in the 19th century (since the Victorians shared our revulsion at explicit and crude language).
In fact, many classics have strong non-Jewish (particularly Christian themes) , though most rabbis aren’t familiar with them enough to object (e.g Moby Dick, or more recently and hardly a classic Harry Potter, are examples of works whose Christian themes are not recognized by most rabbanim).