Recommended supplementary books for Quantum Mechanics:
Advanced Linear Algebra , S.Roman
Analytic Perturbation Theory for Matrices and Operators , H.Baumgärtel
Perturbation Theory for Linear Operators , T.Kato
Introduction to the Perturbation Theory of Hamiltonian Systems , D.Treschev & O.Zubelevich

Books Suggested for Cosmology:
Cosmology , S.Weinberg
Introduction to Cosmology , M.Roos
Physical Foundations of Cosmology , V.Mukhanov
Cosmology , P.Coles & F.Lucchin

Books on Astrophysics:
Galaxy Formation , M.S.Longair
An Introduction to Modern Stellar Astrophysics , D.A.Ostlie & B.W.Carroll
An Introduction to Modern Astrophysics , B.W.Carroll & D.A.Ostlie
The Formation of Stars , S.W.Stahler & F.Palla

Texts on Meteorology & Atmospheric Sciences:
Meteorology Today , C.D.Ahrens
Meteorology for Scientists and Engineers , R.B.Stull & C.D.Ahrens

For those interested in Differential Geometry, Manifolds & Topology:
Gauge Fields, Knots and Gravity , J.Baez & J.P.Muniain
An Introduction to Manifolds , L.W.Tu
Introduction to Smooth Manifolds , J.M.Lee
A Comprehensive Introduction to Differential Geometry , M.Spivak
Differential Geometry Lie Groups, and Symmetric Spaces , S.Helgason
Semi-Riemannian Geometry with Applications to Relativity , B.O'Neill