There are probably 200,000+ book.
There is nothing new about learning tactics.
An old Barnes and Noble book, (publisher) was Reinfeld's 1001 Chess Combinations. Reinfeld wrote many more books about a similar subject.
Znosko Bprovsky wrote a book about tactics even earlier.
Znosko-Borovsky, Eugene . The Art of Chess Combination. Dover
Wikipedia says 1977. Quite wrong. The book by Dover was edited probably by Reinfeld in the 60's. One of the first chess books I read.
When you want to learn chess from books you start with the endgame.
You get a good endgame manual. There are new ones, and old ones. And revised ones. (Fine's BCE, revised by Benko).
The idea of tactical training may have become popular from Spassky and Tal. In several of books about the two players they had personal trainers who specialized in tactical chess.
There are even websites on the subject.
Chess Tactics Server
(You get rated on solving. A website located in Berlin).
Questions you have to ask when learning chess whether you are 10, 15, or 25 where do you want to go, what will you know about chess 20 years from now. It will not come from tactical training. It will be from the endgame.
I have to imagine, Capablanca, Alekhine, Reshevsky, Botvinnik, Smyslov, Karpov, Kasparov and others it was the end game. Studying the later games of Fischer it was the end game. (See the Roman DVD on Fischer).