Scan the reviews of No Fools, No Fun , the 2014 debut album by Puss N Boots, and you’ll find nearly every critic scrambling to drop the group into one stylistic box or another. Were they alt-country, Americana, jazzy pop, neo-folk or none/all of the above? It’s a good bet that Sister , the group’s sophomore release, will confound the scribes even more. Best to just go along for the ride. Here, as on the debut, Norah Jones, Sasha Dobson and Catherine Popper, each a formidable singer, songwriter and multi-instrumentalist, exert their individuality while never losing sight of the group dynamic. Whether in harmony, or with one of the singers taking up the front position, they are masters of delivering a lyric with panache and assuredness. And, as musicians who’ve been known to pick up instruments they don’t customarily play, they find unconventional ways of providing refreshingly original contexts to both the songs they write and those they borrow. Among the latter, Tom Petty & the Heartbreakers’ “Angel Dream” and Dolly Parton’s “The Grass Is Blue” are rendered as intimate, airy ballads, the words pushed to the fore. Writing both together and apart, the trio are equally effective: The collectively written “It’s Not Easy” is instantly and wholly bewitching, while Popper’s “The Razor Song” is heavenly and swinging. Dobson’s “Nothing You Can Do” is tough and unforgiving while Jones’ lone solo-penned contribution, “You Don’t Know,” wishes it could float out of a radio somewhere near Nashville circa 1954—you’ll just want to play it again and again.