Today marks the 20th anniversary of the September 11th terrorist attacks. I have hard time believing that it happened two decades ago, when on bright sunny morning, a city and a world were changed forever. Today brings sadness and pain but like a phoenix, the world rised out of the ashes and continue to rebuild through strength, hope and unity. And although we still are dealing with the aftermath of 9/11, what we have felt and learned from that day will remain.

There are so many stories out there that reflect the events and the aftermath of 9/11. To keep the memory of that day alive, it is important to read the powerful historical accounts and inspirational stories of that horrid day. For the 20 years, here are 20 book recommendations that help commemorate September 11 and make us remember to never forget: