Samsara dog by Helen Manos; illustrated by Julie Vivas.

Samsara dog by Helen Manos; illustrated by Julie Vivas. Working Title Press 2006.

A story of reincarnation, with Samsara Dog returning in many lives until it learns the lesson of love.
Beautifully told, and beautifully illustrated, this is a treasure.
Although not specifically about death, but it does happen, this would make a wonderful starting point for a discussion about reincarnation.