who has written about these rings?
J. R. R. Tolkien
Rings of Power
The Rings of Power (also known as the Great Rings) are fictional magical artefacts appearing in J. R. R. Tolkien's legendarium. 
who made the rings of power in lord of the rings All but one of the twenty rings were created by the Noldorin Elven-smiths of Eregion in the Second Age. The remaining one was secretly forged by Sauron.
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Rings of Power [SEP] Introduction
The Rings of Power (also known as the Great Rings) are fictional magical artefacts appearing in J. R. R. Tolkien's legendarium. Primarily featured in his epic high fantasy novel "The Lord of the Rings" (1954) but also in many of Tolkien's other writings, these magic rings are depicted as the objects essential in the Dark Lord Sauron's plan to rule over Middle-earth as the "Lord of the Rings". All but one of the twenty rings were created by the Noldorin Elven-smiths of Eregion in the Second Age, led by their ruler Celebrimbor under the deception of Sauron, who guided them in their craft under the guise of a fair-looking emissary named Annatar.