English for Today by Ganiu Abisoye Bamgbose (Dr GAB)
THE GRAMMAR OF LITERATURE REVIEW
It is important to keep up-to-date with the ~literatures~ in your field (nonstandard).
It is important to keep up-to-date with the literature in your field (standard).
All the information relating to a subject, especially information written by experts in a field are collectively known as literature.
The literature on COVID-19 ~are~ still scanty (nonstandard).
The literature on COVID-19 is still scanty (stadard). Although literature refers to all the books and articles about a subject, it is considered an uncountable noun and attracts a singular verb.
GAB