@ElioIan_jkkth Ruthless Devotion can be read as a standalone in terms of the main couple and their journey.
However, it is part of a connected series, and many characters, past events, and dynamics carry forward from Book 1 and Book 2.
You can read it on its own, but I highly recommend reading the first two books before Ruthless Devotion so you don’t miss important backstories, emotional depth, and the full impact of the story. Reading them in order truly enhances the experience