Superconductor ferromagnet nanostructures : an illustration of the physics of hybrid nanomaterials The basic formalism Conservation laws and triplet conversion Thermodynamics Triplet pairing generation and its consequences Experiments : transition temperature and triplet conversion in spin valve structures Transport : introduction Charge transport Spin transport Spin and charge transport : the voltage dependence of the conductance Ferromagnetic Josephson junctions : statics Ferromagnetic Josephson junction valve structures : quasiparticle conductance. This books main purpose is to explain how the equilibrium and transport properties of superconductor ferromagnet heterostructures can be accurately calculated starting from a standard BCS type Hamiltonian. The main techniques including both analytical and numerical methods are discussed in detail. Results obtained from these calculations are shown to be in excellent quantitative agreement with experiment. This is a theory book but the theory is neither abstruse nor esoteric. Knowledge of only introductory graduate physics has been assumed; a solid undergraduate training and a bit of perseverance would also be enough. This book can easily be read and understood by experimentalists and just about anybody can grasp the basics by referring to the figures and explanations. Quite apart from the manifold applications of superconductor ferromagnet nanostructures studying them provides us with considerable insights into fundamental physics and the general study of hybrid nanomaterials