chess tactics

I'm currently reading Susan Polgar's Chess Tactics for Champions and it fits your description. Each chapter starts with a description of the tactic along with 4-5 illustrative examples and an example from a real game. This is followed by 50 test positions. The answers are given at the end of each chapter so you don't have to flip all the way to the back of the book like some books.

The thing I like most about this book are the answers which describe the characteristics of the position and the solution in words. This is helpful because sometimes it clues me in on some nuances of the position that I might have missed if just the solution was given with no explanation.

From the Table of Contents

Tactical Elements to Win Material or Checkmate

1. Forks and Double Attacks
2. Pins
3. Deflection/Removing the Guard
4. Discoveries
5. Double Check
6. Skewers
7. Trapping Pieces
8. Decoys
9. Intermediate Moves
10. Pawn Promotion
11. The Back-Rank Problem
12. Destroying the Castled King's Defenses
13. King Chase
14. Mixed Checkmates in Two Moves
15. Mixed Checkmates in Three Moves
16. Mixed Checkmates in Four Moves

Tactics to Save the Game

1. Game-Saving Combinations
2. Perpetual check
3. Stalemate

Other Ideas

1. Traps and Counter-Traps
2. Sibling Positions
3. Twenty-five Famous Combinations

Thanks.