Kelly:

If this book isn't in the public domain, I wouldn't rely on "academic" use to avoid infringement. That was meant to cover libraries and universities. In other words real academic and "fair" uses. Fair use comes up as a defense in many cases and there are legal standards for what you need to prove. If I give you a copy of sections of a book so that you don't have to buy it, that's hardly an academic use. BTW, new and used copies of many versions of that barbers' manual are still on sale.

For technial reasons of copyright law, you might avoid all liability for copying if you bought a book previously purchased by someone else.

None of this means anyone is going to get sued here (there are civil and CRIMINAL penalties), but there is now some crazy enforcement going on out there. It doesn't make sense to jeopardize anyone, especially the good folks who run this site and the Group.