Great
I have all of Francis Ching's books, even a few personal diary type ones, as I just love his clear, direct and concise linework, a skill rapidly disappering in this digital age but I hope survives somehow
This book is more for the experienced drawer but there is something in it for everyone and compliments the "primer" Architectural Graphics by him.
Buy it as reference or just to read as I believe it is that good and I teach architects to draw for a living.