Tactics Time 2 is now out in paperback, from Publisher New in Chess.
This book contains 1001 hand picked problems, which come from the games of amateur chess players like you and me.
It contains the types of tactical problems that you are likely to see in your own games - pins, forks, skewers, mating nets, trapped pieces,
overloads, under defended and loose pieces, etc.
I've heard from literally hundreds of players from around the world that these books have helped them improve and win more games, and I think it can help your chess game too. Even solving just a handful of positions on a consistent basis can add up to seeing tangible results in your game.