WTB: PDP-8/e handbook

[W2HX]

Hi all,

I am in the market to obtain the PDP-8/e small computer handbook in the form of 
a real book. There is one on ABE books available which is softcover. I always 
worry about a 500 page book in softcover in terms of the binding and general 
sturdiness. Was there a hardcover version of this book and does anyone have one 
for sale?
Thanks
Eugene W2HX