I seem to be on a book & DVD promotion kick...

I could not watch this film all in one sitting.
It was too emotional for me-- the writers could easily be my students.
The film is broken into chapters, so that made it easier for me to watch in bits. But not easier to watch.
I like that the chapters are told in different ways. One chapter was animated. Another chapter was told (somewhat) humorously. The film starts out with "Here, Bullet" read by Brian Turner.

http://www.amazon.com/gp/product/B000WOSB0U/ref=pd_lpo_k2_dp_sr_2?pf_rd_p=486539851&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=1400065623&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1B0PHG85HAWX5VCHYFCN