Puzzles for secret agents

Your code name is Agent W and you have just completed five years of intelligence training in preparation for your first assignment. Those five years were mentally demanding, but thanks to them you can now complete the tasks that await you. You have learned to decipher codes, observe all sorts of people, memorise everything about witnesses and crime scenes, and notice the subtle differences between objects and their possible forgeries. It's been a long road, but now you finally have your first job at the intelligence headquarters in a Central European city. For security reasons, you cannot reveal its exact location, but it was chosen for its excellent connections to the rest of the world. In this role, you will be constantly on the move, using planes, trains, and ships as needed. In short, it is the action-packed environment you have always dreamed of.
Now it's time to turn the page and reveal your missions. They are of all different kinds and match the diversity of your
training. As you gain experience, their difficulty will also increase. You'll start as a rookie agent and have to prove your worth to get promoted. If you're ever not sure how to proceed, you'll find all the solutions at the end of the book, where there are also pages where you can write down your findings.