Shop › Spirit World Field Guide Skull Spirit World Field Guide Skull $25.00 4.5×4.5 inch ink drawing. From Aesop Rock’s album Spirit World Field Guide.Part of 2024’s Inktober (prompt: guidebook) 4.5×4.5 inch ink drawing. From Aesop Rock’s album Spirit World Field Guide.Part of 2024’s Inktober (prompt: guidebook) Purchase Added!