Although it’s as common as air, love remains a mystery. What is this cosmic combination of custom and chemistry? Why can it consume itself in an instant or grow to fill a lifetime? How can we understand the infinite variety of emotions that are contained within this simple word? And most importantly, why is it exactly like a potato? The answers to these questions (well, the last one, at least) will be revealed in the coming concert series by Impromptu.

The group has changed members over the years but remains committed to sharing the delight of music through its unique blend of voices and eclectic repertoire of songs. Its 11 members are a versatile mix, as well. They come from all over central Maine and hold day jobs as varied as lawyer, park ranger, music teacher and physician, among others.

This spring’s concert series, “Traveling through Love,” explores the full range of love -romantic, familial, global and gustatory – in songs from the Beatles to Broadway to Russian folklore and everywhere in between.

Impromptu will perform at 6:30 p.m. Saturday, June 18, at the Hampden Congregational Church in Hampden.