ኩሽ እና ኩሻዊ ኩሽ በሀገር ስምነት የሚወክለውን ጥንታዊ ሀገር፣ በዚያ ሀገር ይኖሩ የነበሩ ህዝቦች ማንነትና የነበራቸውን ስልጣኔ፣ በመፅሀፍ ቅዱስ ያለውን የኩሽ አጠቃቀም፣ እንዲሁም ኩሻዊ በመባል የሚታወቁት ቋንቋዎችን እና ተናጋሪዎቻቸውን በጥልቀት ቃኝቷል። ኩሽ ከመፅሀፍ ቅዱሱ አጠቃቀም እና ከጥንታዊ የኩሽ መንግሥት ጋር አንዳንዴ እየተደባለቀ በኢትዮጵያ ታሪክ መቅረቡንም ዳስሷል። ኩሽ በሚል ይጠቀስ ከነበረው ሀገርና በዚያ ከሚኖሩ ህዝቦች ጋር አሁን ያለው ኩሸቲክ/ኩሻዊ የሚለው የቋንቋ ቤተሰብ ስያሜ አጠቃቀም የሚያገናኘው ነገር መኖር አለመኖሩን ሰፋ አድርጎ ቃኝቷል።
 
Kush/Cush and Cushitic: Language, History, Race, and Religion offers a multifaceted examination of the term “Kush/Cush” and its related concepts, drawing from historical, linguistic, and cultural perspectives. In the realm of historical linguistics, “Cushitic” is employed to describe a hypothetical language family within the Afroasiatic phylum. This term may also be used to refer to the people who speak these languages. However, there is often confusion between this academic usage and the ancient kingdom of Kush, which is frequently referred to Nubia in historical works. The confusion extends to the usage of the same term in Biblical texts. The book delves into the history of the Kingdom of Kush, the Biblical usage of Kush/Cush, and the so-called Cushitic languages, offering a nuanced discussion of these intertwined topics.