"If I take death into my life, acknowledge it, and face it squarely, I will free myself from the anxiety of death and the pettiness of life - and only then will I be free to become myself."
Some good Heidegger books
Heidegger: A Very Short Introduction (Very Short Introductions)
a good introduction to Heidegger in a manageable book.
Basic Writings: Martin Heidegger (Routledge Classics)
nothing 'basic' about these writings but a fine collection of writings by the philosopher before heading into further works.
Being and Time
my favourite! Hard going but so rewarding once you 'get it.'