The famous physics textbook written by the theoretical physicist L. D. Landau and E. M. Lifshitz are freely accessible from the following links.
Mechanics 3rd Edition (Course of Theoretical Physics Vol. 1)
https://archive.org/details/Mechanics3eLandauLifshitz
The Classical Theory of Fields (Course of Theoretical Physics Vol. 2)
https://archive.org/details/TheClassicalTheoryOfFields
Quantum Mechanics (Course of Theoretical Physics Vol. 3)
https://archive.org/details/QuantumMechanics_104
Relativistic Quantum Physics Part1 (Course of Theoretical Physics Vol. 4)
https://archive.org/details/RelativisticQuantumTheoryPart1
Statistical Physics (Course of Theoretical Physics Vol. 5)
https://archive.org/details/ost-physics-landaulifshitz-statisticalphysics
Fluid Mechanics (Course of Theoretical Physics Vol. 6)
https://archive.org/details/FluidMechanics
Theory of Elasticity (Course of Theoretical Physics Vol. 7)
https://archive.org/details/TheoryOfElasticity
Electrodynamics of Continuous Media (Course of Theoretical Physics Vol. 8)
https://archive.org/details/ElectrodynamicsOfContinuousMedia
