A good resource for the very bright young person of your acquaintance.
Here are links to those four books at Amazon. I’ve encoded them so that a local veterans’ charity organization receives a commission (4%), which does not increase your price to buy them.
Investigating the Book of Mormon Witnesses
Opening the Heavens: Accounts of Divine Manifestations, 1820-1844
Remembering Joseph: Personal Recollections of Those Who Knew the Prophet Joseph Smith
Understanding the Book of Mormon: A Reader’s Guide
They are likely also available on ebay.