[FOM] A textbook on logic with natural deduction

[paul@personalit.net]

>
> The fact that the  
> expensive edition that George McNulty mentioned exists means that the  
> Hackett edition is probably out of print.

The CRC website says their edition of Lemmon's book is "not for sale to 
customers in the USA."

The Amazon.com website sells copies of the under-$20 Hackett edition, 
and the cover looks identical to the CRC edition.

Cheers,

-paul