Subject
4 free books about selling, free to read online. Chapter 1 of any book is free, no account needed.
Business Administration: Theory, Practice and Application. [Vol. 1] Business Economics
Certain Success
Norval A. Hawkins
Letters From an Old Time Salesman to His Son
Roy Lester James
Selling Things
Marden, Orison Swett; MacGrail, Joseph Francis