I found this book rewarding not so much for the narrative as for the "bottom line" historical facts it filled in for me. I generally prefer unabridged versions, but I am inclined to think the abridged version would have sufficed.
This is a great story, but one that raises many regrets with the benefit of historical hindsight. What a land Lewis & Clark explored! But what a tragedy in light of what we know to have happened to the native peoples and to the animal populations. Then of course the book finisishes with Lewis's spiral into suicide. Altogether, the book left me in a very depressed frame of mind.