In measure theory, a familiar representation theorem due to F. Riesz identifies the dual space *L*_{p}(X,L,λ)* with *L*_{q}(X,L,λ), where 1/p+1/q=1, as long as 1 ≤ p<∞. However, *L*_{∞}(X,L,λ)* cannot be similarly described, and is instead represented as a class of finitely additive measures.

This book provides a reasonably elementary account of the representation theory of *L*_{∞}(X,L,λ)*, examining pathologies and paradoxes, and uncovering some surprising consequences. For instance, a necessary and sufficient condition for a bounded sequence in *L*_{∞}(X,L,λ) to be weakly convergent, applicable in the one-point compactification of X, is given.

With a clear summary of prerequisites, and illustrated by examples including *L*_{∞}(**R**^{n}) and the sequence space *l*_{∞}, this book makes possibly unfamiliar material, some of which may be new, accessible to students and researchers in the mathematical sciences.