Can you recommend a good book about the Vietnam war? That is telling the story from the American side.
One highly regarded book that tells the story of the Vietnam War from the American perspective is The Things They Carried by Tim O'Brien. It is a collection of interconnected short stories that draw heavily on O'Brien's own experiences as a soldier in Vietnam. The book provides a unique and personal view of the war, exploring themes such as memory, guilt, and the effects of trauma.

Another classic book on the subject is Dispatches by Michael Herr. The book is a collection of Herr's observations and experiences as a war correspondent in Vietnam. It provides a gritty and visceral depiction of the war and its impact on those involved, and has been praised for its honesty and authenticity.

Lastly, A Bright Shining Lie: John Paul Vann and America in Vietnam by Neil Sheehan is a Pulitzer Prize-winning book that focuses on the life and experiences of John Paul Vann, a US Army officer who served in Vietnam. The book provides a detailed and nuanced view of the war, and explores the complexities and contradictions of US involvement in Vietnam.

All three of these books offer powerful and thought-provoking perspectives on the Vietnam War from the American side.
Thank you, I'll be sure to check it out in my free time. Do you know of any websites which I can purchase these books from?
There are many sites from which you can purchase books from, including AbeBooks, Book Depository, Alibris, BookOutlet, Kidsbooks, Walmart, Booktopia, Thrift Books, Books A Million, Amazon Books, Barnes & Noble, Better World Books, Biblio, BookMooch, Book People, Target, Costco, Daedalus Books, eBay, Powell's Books, The Strand, Hudson Book Sellers. 
If you cannot find the books there, you might want to consider downloading a digital copy from annas-archive.org instead.
Can you recommend some other websites to me from which I can download digital copies of content other than books?