„(…)Pentatonic scale has notes that when played generate a pleasant melody, even if it is just the execution of this scale from up and down. This makes the life of everybody easy! It is just to memorize the pentatonic scale and then, when you are going to improvise a song in a major tonality, instead of “elaborating” a phrase with a major scale you play the pentatonic scale and it is guaranteed success! The pentatonic scale played backward is nice; played forward is nice; played from the middle to the end is nice, from the end to the beginning is nice, nice, nice, nice…”
PDF has 20 pages. Contains pentatonics and exercises that you can use on major, minor and dominant chords. You don't have to remember how the altered scale is built, just use the appropriate minor pentatonic scale.