Final answer:
The line that shows how the speaker felt about the library is 'All those books-another world-just waiting.'
Step-by-step explanation:
The line from "My First Memory (of Librarians)" that is an implicit detail showing how the speaker felt about the library is: All those books-another world-just waiting. This line suggests that the speaker views the library as a magical and exciting place, full of possibilities. The phrase "another world" emphasizes the speaker's sense of awe and wonder towards the books, highlighting their importance and significance.
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