After the unexpected success of the first edition of this dictionary, I considered it a good opportunity, instead of proceeding with the publisher for a simple reprint, to work on a new edition in which not only the necessary corrections to the oversights of the first edition (fortunately very few) would be made, but also some new entries that I had omitted and was already working on with the prospect of a second edition would be included.
Regarding the philosophy of the dictionary and its content, there was no substantial change concerning the peri-Hellenic peoples, whom I deemed should be included, and the chronological limits it covered (end of Neolithic - beginning of Roman period), always facing the existing problem of the risk of it turning into a bulky and unwieldy work.[...]
(From the introduction to the second edition)