Thirteen Serious Considerations borrows it’s name and format from a little known mail-art project by Dick Higgins, published in 1978.
The hand-stamped cards are excerpts from a video called Pop Quiz, which collects every question from the lyrics in my personal music library. A recent iteration contains over two thousand questions and is over four hours long. A previous sampling was published as a bookwork by Paul+Wendy Projects in 2010.