Bernal recently published a third volume of his Black Athena. Containing reams of stuff about linguistics. If its like his earlier stuff its VERY dubious. His theory about Egyptian colonization of Greece of Greece is frankly farfetched and lack archaelogical support (to put it mildly).

Frankly I suspect that underneath all the guff and nonsense is actually a pretty good book(s) but unfortunately it is well covered by the guff.

Pierre