As Bob notes above, The Sun and How to Observe It by Jamey L. Jenkins, Springer 2009, ISBN 978-0-387-09497-7 is an excellent mid-level intorduction to solar observing and available from Amazon:
You are a child of the universe,
no less than the trees and the stars...
And whether or not it is clear to you,
no doubt the universe is unfolding as it should.