The following two volumes were published:
Vol. 1: Principles (1998) ISBN 0-7923-8174-2
List of contents and contributors, Vol. 1; Springer Link
Vol. 2: Extensions (2004) ISBN 1-4020-7714-9
List of contents and contributors, Vol. 2; Springer Link
A third volume on “Empirical Work and History” was announced but never completed.
Springer are planning to published a revised Handbook with new editors.