The previous page is sending you to https://www.vitalsource.com/products/raspberry-pi-and-mqtt-essentials-dhairya-parikh-v9781803238395?duration=perpetual&srsltid=AfmBOoooysYxkpaZXDIGUzEngcVoZC3GDhfbKzhauRaJEp50e5JGsIApA7s.

 If you do not want to visit that page, you can return to the previous page.