I don't know what they're teaching in Finland today, but I like these authors and their sense of curiosity. Good on them for writing this book!
This book is what makes the Maker movement kick some tail. "Make: Sensors," covers both Ardunio and Raspberry Pi connections, coding, layouts. I was happily amazed at what I got when the book arrived in the mail. I knocked down another Make: book due to lack of color diagrams... well, Make: Sensors has those color Fritzing diagrams to show the layout connections.
The only downside (if you can call it that) is the price. If you want it, get it. If you've got a cursory interest, rent it perhaps or take a gander at the bookstore.
Most (if not all) of the projects will require sensors or things that cannot be readily obtained at your local electronics store. If you want to do the projects, you'll have to get these components.
Bottom Line: if you want your Arduino and Raspberry Pi projects to "sense" the real world, get a good start by getting "Make: Sensors."