Focus heavily on the applications section (areas, lengths, volumes) as these are common in examinations.
While many look for "exclusive" PDFs, the physical copy remains a fixture on the desks of serious math students because of its clear, no-nonsense proofs and the sheer volume of practice it provides. step-by-step solution to a problem from the Ghosh and Maity collection?
Convergence tests (Comparison test, Abel's test, Dirichlet's test), absolute convergence, and the Beta and Gamma functions.
The final chapters focus on the geometric and practical applications of integration.