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The major story arc for this book is of course saving Israel's life, however, the pseudo relationship between Alyx and Jordan definitely takes the spotlight.
Alyx looses her memories of her love for Israel and now her latent feelings for Jordan are starting to surface.
Given that Alyx made her feelings known to Jordan, that they would never have any kind of relationship, it raises the very integral question as to why this sudden change in behavior didn't raise any red flags for him... or maybe they did?
When the truth comes to light, Alyx is now completely torn between her love for Israel and Jordan.