Hej! There's a grammar book by Е.Л. Жильцова (in Russian) - very thorough and good for understanding the basis. If you are more than a beginner, try "Rivstart" books, they provide grammar explanations as well as exercises.

I don't know about any books, but this verb conjugator is something I recommend to all my students. https://sv.bab.la/verb/svensk/sjunga Here is a wikipedia site with Swedish grammar. https://sv.wikipedia.org/wiki/Svensk_grammatik And here is something I found now http://blog.lardigsvenska.com/p/grammar.html