Tritton, "Physical Fluid Dynamics" (Oxford)
Segel, "Mathematics applied to continuum mechanics" (Dover)
Landau & Lif****z "Fluid Mechanics" (Pergamon, may be a different publisher now)
Lamb, "Hydrodynamics" (Dover)
The first two are excellent introductions, the second two more advanced. There's also a Dover book entitled "Vectors, Tensors, and the Equations of Fluid Dynamics", by Arris(?) which is great to have on hand until you master the equations yourself.