This volume contains a detailed grammatical description of the dialects of Old Arabic attested in the Safaitic script, an Ancient North Arabian alphabet used mainly in the deserts of southern Syria and north-eastern Jordan in the pre-Islamic period. It is the first complete grammar of any Ancient North Arabian corpus, making it an important contribution to the fields of Arabic and Semitic studies. The volume covers topics in script and orthography, phonology, morphology, and syntax, and contains an appendix of over 500 inscriptions and an annotated dictionary. The grammar is based on a corpus of 33,000 Safaitic inscriptions.