Do what thou wilt shall be the whole of the Law,Liber VII - Liber Liberi vel Lapidis Lazuli,
with commentary by Aleister Crowley (and supplemental notes and explanations), is now available as a free digital download from College of Thelema.
Just go to www.thelema.org/publications
and grab acopy.
An earlier edition of this was available back in the '90s, but has long been out of print. This edition should fill a need.