noun, noun which may take the genitive case particle 'no'
must-read; required reading
Describes a book, article, or document that is considered essential or obligatory to read. Often used in recommendations or syllabi.
この小説は学生にとって必読の一冊だ。
This novel is a must-read for students.
教授は必読文献
The professor handed out a list of required readings.