Specialists of topos theory were expecting this Elephant since many years. It is extremely good news that the first two volumes already appeared, without waiting for the completion of the third one.
Bulletin of the Belgian Mathematical Society05/07/2004
This compendium contains material that was previously available only in specialist journals. This is likely to become the standard reference work for all those interested in the subject.
? News (The Newsletter for Philosophical Logic and Its Applications)