Hey, Jeff. I agree that HP's blues lessons are excellent & a lot of fun to play!
Originally Posted by: ...there is a notation on the introduction page with a "tiny" note. What does this mean?
"Tiny" notes, or notes in smaller print, are grace notes
Grace notes come is several varieties, but they are usually ornamental notes that happen very quickly (before, or right on the beat), that support the more important note they lead to.
Originally Posted by: Similarly, in the same music there are notes in brackets. What does this mean?
Notes in brackets or parentheses are notes held over from the previous measure. This is more clearly shown in the musical notation above the tab by long, curved arcs connect the noteheads across measure bar lines.
Hope that clears things up. Ask more if necessary. Have fun. :)