You can buy the Programming the Pico directly from the following retailers.
This book will teach you Python programming and some basic electronics without assuming any prior knowledge of either subject.
The book initially focusses on Python programming, building up a Morse Code example using the Raspberry Pi Pico’s built-in LED. Once you have mastered the basics of coding the Pico, the book will introduce electronics, showing you how to use sensors, switches, LEDs, servomotors and displays attached to your Pico.
All the parts used in the book are available in a companion kit by MonkMakes Ltd.
Paperback: 162 pages, ISBN-13: 979-8464882171