  We review the theory of entanglement measures, concentrating mostly on the
finite dimensional two-party case. Topics covered include: single-copy and
asymptotic entanglement manipulation; the entanglement of formation; the
entanglement cost; the distillable entanglement; the relative entropic
measures; the squashed entanglement; log-negativity; the robustness monotones;
the greatest cross-norm; uniqueness and extremality theorems. Infinite
dimensional systems and multi-party settings will be discussed briefly.
