Both of Lawrence Hill's comfrey
books have wound up on the list of digital downloads that you can get from
the soilandhealth.org.au because of their being out of print for so long.
Looked up the Canadian Amazon---hardcover is 439.53$Can or 50.85 for softcover--expensive books....
If you just want them to read, they can be downloaded from Soil+Health for
free; you just have to
say that these digital repros are for your personal use and not for resale.