An Introduction to Adobe Photoshop
This is a free textbook offered by BookBoon.
This is the first in a series of books on Adobe Photoshop. Together, they will give the reader a good foundation in some of the major features of this ground breaking and industry changing program. They will cover general topics that will satisfy users from varying industries. However, there are also a number of industry specific "need to know" items, to help users to work effectively.
Learning Photoshop can be a daunting experience. It's a large and complicated program that may take several years to truly master. These books are designed to place your feet firmly on the path to understanding and will guide you to the knowledge that will enable you to progress into a fast and productive Photoshop user.