May 4, from 1 to 3 p.m., Tatnuck Bookseller, 18 Lyman St., Westborough, will host George Foster Leal, author of The Lost colony of Roanoke. Don Robeson is called on by fellow archaeologist and quirky friend Professor Archibald Caulder to authenticate a hand-written journal. Dated 1587, the journal, if authentic, may be the key that unlocks the oldest mystery in American history – the fate of the Lost Colony of Roanoke. Soon after Don receives the journal, Prof. Caulder dies suddenly under mysterious circumstances. All are welcome to meet the author.