"Plaine and Easie Introduction to Practicall Musicke" is a foundational music theory book written by Thomas Morley in 1597. It serves as a guide for beginners, explaining the basics of music notation, rhythm, and harmony. Morley aimed to make music accessible to everyone, breaking down complex concepts into simple terms. The book covers essential topics such as scales, intervals, and chords, providing practical exercises for readers. Morley's approachable style encourages aspiring musicians to explore the art of music-making, fostering a deeper appreciation for the craft. This work remains influential in music education today.