Hi, if you had it in your library before it was previously deleted, it should be back soon. A few of my readers got it a bit late, so you have to be patient because it will reappear soon, I just don't know when. As the author, watt pad hasn't contacted me or told me anything about my book.
For some people it takes a while for it to come back, some people got it back instantly, and then some people took a couple months and weeks. As long as you had it in your library before it was deleted, it should come back soon! ❤️