Now, the latest question is slightly different because the user specifically asks for (at least) two books, the first one very theoretical and not specifically related to forecasting, and a more applied second one, targeted at forecasting. Thus, in principle, the user might not be satisfied by Andre Silva's links. However, to avoid duplicating (or nearly duplicating) questions, I was thinking of adding my answer to the Community Wiki question, and let the user know with a comment. I think that's fine, what do you say?
Absolutely fine—in my opinion the best thing to do. Several threads have already been merged with Books for self-studying time series analysis? & doubtless more will be. Questions asking for textbook recommendations are often differentiated only by rather specific, personal requirements that are barely reflected in the answers: it's best to aim for a single well-curated thread with a set of answers describing each book well, providing readers with the information to make their own decisions.