Photon and Core boards are available from a wide range of suppliers and from Spark themselves. (Adafruit and Sparkfun are good suppliers for hobbyists.) You will also find kits, shields and other interesting Photon/Core compatible modules.
Most of the parts used in this book are available in the Maker’s Kit available directly from Spark. This is by far the easiest way to source your components. All of the components are also available individually or as parts of other kits from other suppliers. The sections below list these parts and will give you some help finding them.
The codes next to each part match up to the codes used in the parts bins listed at the start of each project in the book.