Helen, that Equalizer is a remake of a several of decades old program (I haven't watched either one.) The earlier one starred the British actor Edward Woodward.

A lot of the popular novels we've mentioned here have associated "Wikis" or online fan sites for sorting out the minutiae of the books and or the films that follow. (For example, Lord of the Rings). Wikipedia has a lot of synopses of novels and bibliographies for authors. The site I use when I'm trying to read a particular author's books in order is Fantastic Fiction. It also gives you the altered names from different printings or publishers in various countries. I just pulled up JRR Tolkien. Wow. That's a kettle of fish - it looks like the family has harvested a lot of his earliest writings to edit and publish.