Book of Prob
This book is the combined lecture notes of my course IE-231 Introduction to Probability at Istanbul Bilgi University, Turkey. You can find the original lecture notes and archives here. As the name suggests, these notes consist of an abbreviated version of the course as the objective is to give the essence of very significant parts of Probability. The course mainly follows (Walpole et al. 2012).
This book is periodically updated. Latest update is on 2018-05-09.
Walpole, Ronald E., Raymond H. Myers, Sharon L. Myers, and Keying Ye. 2012. Probability and Statistics for Engineers and Scientists. 9th ed. Boston, MA: Pearson.