One of the most accessible, plain-speaking books I'm familiar with on death from a Buddhist perspective is:
Making Friends with Death by Judith L. Lief
She very calmly and clearly talks about death in the context of life. It was written for Westerners, and she doesn't get all buddhisty and religious about it...she talks matter-of-factly about the inevitability of death, about our fears, acceptance of death, the actual process of death, and being present in the dying process...all from a Buddhist perspective. It's a gem of a book and easy to read.
Here's an example of one of the practices in the book, regarding the contemplation of death:
A GUIDED CONTEMPLATION OF DEATH
The practice of contemplating death should be done slowly and methodically. Do not rush. During the practice, when your mind wanders, gently bring it back to the topic at hand, much as you would bring your mind back to your breath in mindfulness practice. Keep it simple and personal. All you need to do is go through the text step by step and reflect on what is said.
Begin by sitting quietly for five to ten minutes.
Repeat three times (silently or aloud): "Death is real. It comes without warning. No one escapes it. My body will soon become a corpse."
Read each paragraph and reflect on it.
Pay attention. Do not let your mind wander.
Think of someone who has died or is about to die. Notice how you feel. Notice the sorrow you feel to lose people you love, the relieve you feel to lose someone you dislike or someone who has become a burden, and the indifference you feel to lose people you don't know or care about.
Think of your own death. It is certain that you, too, will die. Imagine that your death is right before you, as close as if a murderer were holding a knife at your throat or you were walking down the corridor to your own execution.
Cultivate mindfulness and pay attention.
Think of the friends you have lost already and those you will lose in the future, for you will lose them all. Think of the possessions you have acquired so lovingly, for soon you will have none of them. Think of the projects you will never complete, the places you will never see, the answers you will never know.
Think of your body and how it is aging, how it is prey to sickness and stress. Remember that you will lose your body one day, that it will become cold and stiff, a corpse to be buried or burned.
Keep in mind that death comes to everyone. Rich or poor, famous or ordinary, wise or ignorant, every single living being faces death. Think of how hard all beings large and small struggle to live.
Think of the frailty of all forms of life. The slightest mistake can end a life, and a minute change in the environment can make whole species disappear. Think of the many close calls you have had in which only your good luck kept you alive and how your luck can easily turn.
Think how unpredictable death is. You do not know how long your life will be. You do not know in what manner you will die. And you don't know with whom you will be when you face your death, with friends or complete strangers.
Think of the limited extent of your life and how quickly it will pass. Think of the the many beings whose life spans are even shorter than yours, such as your pet dog or cat, or the little insects who live less than a day. Think of the many lives lost in the time it takes to do this exercise.
Now imagine that you are in your final decline and your death will happen within days. Think of what it must be like to know that it is no longer a dream but a reality. It is right in front of you.
Now imagine that your death is not days away, but it is coming this very day, within hours. Sense it approaching you.
Now let it come closer still, to the instant of drawing your last breath. Think of the shortness of that moment.
Now sit quietly and feel each breath as it goes in and out. Feel the life of each breath, how vivid it is and how it dissolves into the space around you. Note the gap as one breath dies and the next has not yet come. Feel the incredible momentum of life, the rhythm of one breath after another, going in and out. Feel the way in which you contact your death at this very moment with each breath you take. Rest in the immediacy and simplicity of that experience
To close, repeat three times (silently or aloud): Having contemplating the reality of death, may I face death fearlessly and help others through this difficult transition. May I participate fully in the ongoing dance of life and death. May I never forget the preciousness of life.
[I should add that Judith trained and practices in the Tibetan tradition...but, death is death in all traditions]