Electronic eBook IV is an extension of the soft covered book “MetaForms and MetaNudes etcetera” and eBook III. The extension addresses the “etcetera” in the title. It contains three new chapters exploring the use of the senses and mind as they apply to the visual arts. The work extends the investigation of time and space to include representations of death, grief and the spirits. The extension touches on the quantum approach to the arts and the use of sirens and mermaids in influencing art. A mathematical model of grief is developed and included. New color palettes based on the Fibonacci and Lucas series are outlined. The extension also addresses the nature of the edges of images and shadows. Seventeen art images and five photographs by the author and twenty-one images from others are included.