Numerology began as a sketch that Brian Nozny used in a composition class to display certain techniques. He later developed it into a full piece for percussion ensemble at the medium-easy skill level. It is playable as a quartet (solo marimba + percussion trio) or as a septet by adding the other mallet parts. The title of the piece refers to the use of numbers from the initial thematic material that was used as the source for the rest of the composition. Helping fill the gap between easy and advanced percussion ensemble literature, Numerology is a great vehicle for an advanced middle school or intermediate high school ensemble. This piece is dedicated to the students of the 2018 the Birch Creek Music Performance Center composition track in Egg Harbor, Wisconsin, for whom it was initially created. Numerology comes as a professionally printed and bound score and includes individual parts in PDF format for printing or for tablet viewing.