Basic Stochastic Processes Now

: Final-year undergraduates or self-studying mathematicians.

: The book is "interlaced" with numerous exercises that are essential to the learning path, rather than just optional practice. Basic Stochastic Processes

by Pierre Devolder: Focuses on stochastic calculus, Lévy processes, and the Black-Scholes model. Ideal for actuaries or risk managers. Available at Barnes & Noble . For Rigorous Mathematical Theory : Final-year undergraduates or self-studying mathematicians

Depending on your specific goals (finance, engineering, or pure theory), these texts offer different depths: For Financial & Actuarial Depth or pure theory)

by Bruce Hajek: A highly-regarded free resource for engineering students.