Enchant

e = peripheral.wrap("left")
e.setAutoCollect(true)
hasBooks = true

function unload()
  turtle.turnRight()
  for i = 2, 16 do
    turtle.select(i)
    turtle.drop()
  end
  turtle.select(1)
  turtle.turnLeft()
end

function checkFull()
  if turtle.getItemCount(16) > 0 then
    unload()
  end
end

function hasBook()
  if turtle.getItemCount(1) == 1 and turtle.getItemDetail(1).name == "minecraft:book" then
    return true
  else
    return false
  end
end

function depositBook()
  turtle.turnLeft()
  turtle.drop()
  turtle.turnRight()
end

function enchant()
  if e.getLevels() >= 30 and hasBook() then
    turtle.select(1)
    e.enchant(30)
    depositBook()
    turtle.suckDown(1)
  end
end

while true do
  enchant()
  checkFull()
  turtle.attack()
  turtle.suck()
end