Watercolor Sketching: An Introduction

Freehand Sketching

The Urban Sketcher: Techniques for Seeing and Drawing on Location

Everything You Ever Wanted to Know About Watercolor

Urban Watercolor Sketching: A Guide to Drawing, Painting, and Storytelling in Color

5-Minute Sketching -- Architecture: Super-quick Techniques for Amazing Drawings

Watercolor Techniques: Painting Light and Color in Landscapes and Cityscapes

Sketching for Architecture + Interior Design

Artist's Sketchbook: Exercises and Techniques for Sketching on the Spot

The Urban Sketching Handbook: Understanding Perspective: Easy Techniques for Mastering Perspective Drawing on Location (Urban Sketching Handbooks)

The Art of Urban Sketching: Drawing On Location Around The World