Why is "Clarke Studies" trending?

Wikipedia Overview

The Clarke Studies are a series of pedagogical method books written by Herbert L. Clarke for students of cornet, trumpet, clarinet, and other wind instruments published from 1909 to 1915. Initially intended as a 3-volume series of increasing difficulty, the middle volume titled Clarke's Technical Studies (1912) would gain a following independent of the other volumes, becoming "one of the most widely used trumpet method books" and drawing comparisons to the Arban Method. The Technical Studies were preceded by Elementary Studies (1909) and followed by Characteristic Studies (1915), all originally published by L. B. Clarke of Elkhart, Indiana, later passing to Carl Fischer and other publishers. A fourth work published in 1929 called Setting Up Drills, a short collection of 38 exercises in four groups meant to strengthen the lips and be played for half an hour each day, is sometimes considered part of the series.