Tift Merritt is a singer-songwriter of fine shadings, a stylist who plays hopscotch with pigeonholes.

The North Carolina native has released five albums in the past eight years, each seeming to lean toward one of the closely connected subgenres that comprise her approach: Americana, blue-eyed soul, alt-country, pure folk, folk-rock.

Dusty Springfield, Linda Ronstadt, Emmylou Harris and Lucinda Williams are all credible points of comparison -- except that Merritt has a deeper catalogue of original compositions than the first three, and she sings better than Williams.

She's always had a literary bent.

"When I started out, playing gigs and making records was much newer to me than writing," she said by phone from a tour that brings her to the Fine Line Sunday. "When I look back on my first record, I see an inordinate amount of 5 1/2-minute songs. They were short stories. Now I am a songwriter." She laughed. "Three minutes."

Because she prefers her songwriting process to be more intuitive than purposeful, she only belatedly realized that the dozen tunes on her latest, "See You on the Moon," could be organized around the themes of "beginnings and endings." Potential sources of inspiration are easy to spot -- Merritt recently married the man who has been the drummer in her band for 12 years, and there were other marriages and a pregnancy among members of her road and recording crew as "See You on the Moon" was being conceived.

Yet the romantic bookends of infatuation and heartbreak occupy only a portion of the subject matter. Yes, there is a terse kiss-off song, the soulfully scornful "Papercut." But the lyrics that linger are found on the title track, which bids adieu to a childhood friend, and "Feel the World," which seems cast as one grandparent welcoming the other into the afterlife.

"Danny's" girl

There is also a surprisingly effective cover of "Danny's Song," a wide-eyed paean to a couple contemplating parenthood that cynics can easily deride as bathetic, and did approach treacle after Anne Murray made it a hit a year after the original version by Loggins and Messina in 1971.

"We never intended to put that on the record," Merritt said, describing an evening when a few beers were consumed and Murray's name came up. "We were all touched by this song and Tucker [Martine, producer of "Moon"] said, 'Hey, let me set up a mike,' and we thought it might be this funny outtake. But later a lot of musicians we respected heard it and said, 'You have got to put it on the record.'

"There is a real sweetness to it. And I know how [original songwriter Kenny Loggins] feels: Geez, nobody can tell how everything is going to work out, with no real security or money, you know?"

"Danny's Song" is delivered just that way, with spare, understated conviction and a touch of clinging wonderment. Along with her inability to settle on a predictable style, one of the reasons why Merritt hasn't enjoyed more commercial success is this tendency to go gentle with her powerhouse voice.

"There is always a negotiation between words and music," Merritt said pensively. "As much as I like to sing loud and hard, what I like best is singing as one person saying something to another person. That's the heart of it. I'm not a showman -- I'm not 'American Idol.' I don't think I could get up onstage unless the writing of the song led the way for me."

That sentiment guides the set list for Sunday's show and other stops on the current tour. "Some songs you outgrow and other material you rediscover, and address in a different way. I like to play the songs where we don't feel like we have gotten to the bottom of that lake yet. I still love playing 'Good Hearted Man' [from her Grammy-nominated 2004 CD 'Tambourine']. As a writer you hope the songs can stand on their own; that when you come back to them, they've still got at least one leg you can use."