If you're a fan of Boris Vallejo then this book is a must have if you don't already own it, as there are some useful insights and some early sketches which you see later he paints in his masterful style that is so recognizable in his 30 plus year artistic career.
So the book isn't a total loss as his art is inspiring enough to get by, but if you are looking for top fantasy art techniques like the title of the book leads you to think, then you will be disappointed too.
Good to flick through and get inspired by the art alone.
So this book is 7 out of 10.
Fantasy Art Techniques
See also ------ more recommended fantasy art drawing books