These are nice and should help to understand hebrew too:
Introduction to the Semitic Languages. Gotthelf Bergstrasser.
Dialect Geography of Syria-Palestine, 1000-586 BCE. Randall Garr.
Semitic Noun Patterns. Joshua Fox.
Studies in Semitic Grammaticalization. Aaron Rubin.
Linguistic Studies in Phoenician. http://www.eisenbrauns.com/item/HOLLINGUI This book has not been released yet, includes Pardee's view of the calendar of Gezer.
Morphologies of Asia and Africa.
Phonologies of Asia and Africa.
Others (these may have been mentioned in other posts in the past):
A Syriac Lexicon. Michael Sokoloff
A Grammar of Akkadian. John Huehnergard.
Introduction to Classical Ethiopic. Lambdin.
Literate Culture and Tenth-Century Canaan.