Will it be possible to select two books to study from?

I am about to finish Tobira beginners, I want to switch to the other tobira book, but I’d like to still be interrogated on the first book to maintain my knowledge. Is it possible somehow to select two books or more?

I know that you can change at will, but (correct me if i am wrong) when I finished my daily study of beginner, even if I switch deck, my lessons to reviews will still be at 0. Meaning that if I want to study the same deck everyday, I can’t go to another one.

and thanks for that wonderful app, it’s the best I’ve known so far to write kanjis!