Option 1 -> "Evasive" means avoiding or escaping something; doesn't fit the context of recalling memories.
Option 2 -> "Evocative" means bringing strong images, memories, or feelings to mind; perfectly describes a book that recalls forgotten memories.
Option 3 -> "Contextual" means relating to context; doesn't suit the sentence structure about bringing back memories.
Option 4 -> "Obnoxious" means extremely unpleasant; contradicts the positive word "wonderfully."
Hence, Option 2: evocative -> The word "evocative" specifically describes something that brings memories, images, or feelings vividly to mind, which aligns perfectly with a book that recalls "long forgotten memories of bygone times." -> correct