Puhvel, Jaan (1984), Hittite Etymological Dictionary, vol. 1 & 2, Berlin-New York: Mouton de Gruyter, is a reference etymological dictionary of the Hittite language with a lot of textual data, Vol. 2 (words beginning with E and I), second part of a single book containing vol. 1 (A) and vol. 2 (E-I), is a 256 page long volume (pp. 249-504).