Start with high-confidence multivariate analysis books, then narrow by subgenre or adjacent topics.
The Theory of Stochastic Processes
D.R. Cox, H.D. Miller
A Primer in Probability
Kathleen Subrahmaniam
AP Statistics Premium, 2026: Prep Book With 9 Practice Tests + Comprehensive Review + Online Practice
Martin Sternstein Ph.D.
Probability and Statistical Models With Applications
CH. A. Charalambides, M.V. Koutras
Bayesian Statistics the Fun Way
Will Kurt