Missing a Word

One day you hear a song that you really like. You do some poking around and identify the singer, whom, to your knowledge, you've never heard of, or at least never heard. You buy an album for the sake of that song, and discover to your surprise that you've heard (and liked) three or four other songs by that singer.

The song is not literally the first song you've heard by them, but, in a sense, it is.

I'm not aware of any adverb which adequately describes that sense. (It can apply equally well to other arts than music; literature, certainly, but probably also sculpture, painting, even architecture. It could perhaps extend even further; envision a doer of deeds, whose actions have benefited you, all unknowing, until the day you perceive and recognize a thing they've done.)

Any thoughts?

Faded Memory

A long, long time ago - on the order of half a century - I found a book. I think this was during the family's brief stay in Texas, after we returned from Hawaii; the book may have belonged to one of our aunts or uncles. At any rate, it seemed to be one of a series (I may have even seen more than one of them), with a title something like "Off the Beaten Trail". (It might have been "...Track", but I doubt it; it certainly began with "T".) I don't remember much of it, except for one story about the idea of bombing Japanese cities with bats laden with time-delayed incendiaries, but I think the general idea was the collection of oddities, whence the title.

Does any of this ring a bell with anyone? Googling, even with the word "book" attached, only gives links to a line of footwear.