Kashmir Shaivism is an Advaita (nondualist) Shaiva tradition from Kashmir based on Shaiva Agamas. One important scripture i am aware is Shiva Sutra by Vasgupta, in addition to Shivabheda Agamas (as mentioned in this Kamika Agama introduction). What are the important scriptures of Kashmir Shaivism apart from above scriptures?
I know Acharya Abhinavagupta is most important Acharya of Kashmir Shaivism. Please provide works or commentaries of Abhinavagupta which can provide gist or essence of Trika philosophy. Also, post any important works by other Acharyas of Trika philosophy.
In short, please list all important Scriptures or texts of Trika school in descending order, from direct Shiva Beda Agamas (most important or authentic of them) to Works of Acharyas like Abhinavagupta. If possible, provide online links of those scriptures with English translations which are out of copyright.