There is a wonderful obituary of a great man, John L. Sorenson, here:
Brother Sorenson was awesome. I dedicated my book Moroni's America to him (along with Jack Welch, Wayne May, and Rod Meldrum).
John did a tremendous service by researching and publishing on the topics of transoceanic influences and the historicity of the Book of Mormon. While I disagree with some of his assumptions and conclusions about the setting of the Book of Mormon, I deeply appreciate his focus on the text as an actual history.
He laid the groundwork for ongoing research on Book of Mormon anthropology, archaeology, geology, geography, etc.
My condolences to his family.