Hal Lindsay has been one of the most destructive influences in modern eschataology there is! He wrote some fiction books, and people still believe his nonsense today.
I will say, though, my husband got saved reading his books. However, he is still caught in some of the terrible heresies Hal Lindsay invented.
Probably all Christian books should have the gospel presented and an invitation to believe in Jesus. But Hal Lindsay's books should just all be thrown in the garbage.