There are several Urban Sketching books in Kindle format on discount on Amazon right now. After purchase, they can be viewed on Kindle or through your web browser.

These are the titles on sale:

• The World of Urban Sketching: Celebrating the Evolution of Drawing and Painting on Location Around the Globe - US $4.99
• The Urban Sketching Handbook Techniques for Beginners: How to Build a Practice for Sketching on Location - US $3.99
• The Urban Sketching Handbook Spotlight on Nature - US $3.99
• The Urban Sketching Handbook Drawing Expressive People: Essential Tips & Techniques for Capturing People on Location - US $2.99
• The Urban Sketching Handbook Drawing with a Tablet - US $2.99
• Urban Sketching: Capturing the Views Around Us - US $4.35
• The Art of the Travel Journal

And a notable new release The Beginner’s Guide to Urban Sketching: Everything You Need to Know to Capture Your Favorite Places in Ink and Watercolor by Taria Dawson from Taria's Sketchy Adventures