Once you have completed some of the hardware-based recipes in this book, you may find that you want to experiment with other components. There are many places where you can get good value for components and add-on modules for general electronics, and also specifically for Raspberry Pi or other electronic-based hobbies. This list is not exhaustive, but is a selection of places I have ordered items from in the past and that offer good value for money.
General electronic component retailers
You will probably find that every retailer mentioned in the following list has localized sites for their own country, offers worldwide services or has local distribution services: