Quinto-Quarto Suite, composed by Merle J. Isaac for string orchestra (Grade 2), is an engaging multi-movement suite that flexibly balances playability with musical sophistication. The four movements—titled Quinteria, Penticato, Quintillian, and Septarello—offer a journey through contrasting moods and textures, making it ideal for school and community string ensembles seeking a varied and expressive concert piece.