In a world where we are constantly being asked to make decisions based on incomplete information, facility with basic probability is an essential skill. This book provides a solid foundation in probability theory designed for intellectually curious readers and those new to the subject. Through its conversational tone and careful pacing of mathematical development, the book balances charming style with informative discussion. This text will immerse readers in a mathematical view of the world. Rather than simply writing out and memorizing formulas, the reader will get an understanding of what those formulas mean and how to use them. Readers will encounter settings where probabilistic reasoning does not apply or where our intuition can be misleading. This book establishes simple principles of counting collections and sequences of alternatives and elaborates on these techniques to solve real world problems. Readers at any level are equipped to work through exercises on their own.