"Horseback Days and Lightning Bug Nights" by Jake Keeling

Aunt Sis spends long horseback days struggling to maintain her late father's auction business and peaceful lightning bug nights in the old porch swing. Over the course of their summer together, young Chester Joel Durham trades his wheelchair and personal insecurities for the freedom of a saddle and a renewed faith in God. Meanwhile, his aunt relaxes her white-knuckled grip on the past and opens her heart to new possibilities.