He has written several scholarly books and edited conference proceedings and other special volumes.
There were in addition four special volumes compiling material from the regular volumes.
The journal occasionally publishes special volumes of interdisciplinary research.
Debates shall be published textually in special volumes.
He remained in the publication's staff until 2009, working on the creation of several special volumes along the regular issues.
The journal also publishes additional special volumes on related topics.
As of 2009 the series has span up to 10 volumes with 3 special volumes & 1 archive.
The 1997 editorial prefaced a special volume of Intelligence with contributions from a wide array of psychologists.
The Childcraft set also added a separate, optional, special annual volume each year, starting in 1965.
A special volume was released by Kadokawa Shoten on April 7, 2003.