I'm reading Lang's Real and Functional Analysis, and I am surprised that one can still do a fair amount of calculus (differential/integral) on abstract Banach spaces, not just $\mathbb{R}$ of $\mathbb{R}^N$. For example, Lang writes about Bochner integrals - which is slightly different from the 'usual' Lebesgue integral - which gives you a way to integrate Banach-space-valued maps. Also, he uses theorems of differential calculus (of Banach spaces) to prove results about flows on manifolds, which is quite fundamental to differential geometry.
I'm on chapter 7 right now, and I wonder what other good books are there, dealing with this subject: calculus on Banach spaces. After dealing with integration and differentiation (in that order), Lang moves on to 'functional analysis', but I want to see more applications and examples of calculus; for example, Banach-space-valued power series (on $z\in\mathbb{C}$, say), whether one can use the familiar techniques of complex analysis in that case (e.g. Cauchy integral formula), or how the theory is used for differential topology/geometry.
Can anyone suggest a text that gives a complete/thorough treatment of calculus in Banach spaces? (Ones with geometric flavor are even nicer!) Any advice is welcome.
