#### Charles M. Grinstead and J. Laurie Snell

 Digital versions PDF Latex source Yes Exercises Yes Answers and hints Solution manual available to instructors License GNU Free Documentation License
• Text for a first course in probability assuming some understanding of calculus
• The book is open source and can be freely distributed and printed.
• The AMS publishes a hardcover version for $63 ($50 for AMS members).

This book of about 500 pages has become a classic because of its engaging style, interesting examples, historical notes, pedagogical use of computer simulations, and more than 600 exercises. Thanks to the American Mathematical Society the book is freely available, although many readers will want to buy the hardcover edition from the AMS.