Hal Leonard Sight Reading for Mallets by Emil Richards

Emil Richards has performed on literally thousands of recordings for film and TV, many of which had close to zero preparation time. If anybody knows about sight-reading, he does. Sight Reading for Mallets: Jazz Exercises in Even and Odd Times for Mallets and Other Instruments(phew!) is a collection of short etudes designed to gradually increase in reading/musical difficulty, in all sorts of musical styles. Since this is a sight-reading book, you probably don't want to practice these too much or you'll end up memorizing them! Use them every day or every other day to develop your reading skills.