How do I address this error in this Python code

I have recorrected the code as below..
class Node :
def __init__(self, newData):
self.data = newData
self.next = None

def getData(self):
return self.data

def setData(self,newData):
self.data = newData

def getNext(self):
return self.next

def next(self):
return self.next

def setNext(self,newNode):
self.next = newNode


class LinkedList :
def __init__(self):
self.head = None

def AddBookToFront(self,newNode):
newNode.setNext(self.head)
self.head = newNode

def getNext(self):
return self.next

def insertAfter(self, prev_node, new_data):

if prev_node is None:
return

new_node = Node(new_data)

new_node.next = prev_node.next

prev_node.next = new_node

def AddBookAtPosition(head, newNode, position):
start=head
if position == 0:
return Node(newNode, head)
while position > 1:
head=head.getNext
position-=1
head.next= Node(newNode, head.next)
return start

def printAll(self):
cursor = self.head
while cursor is not None:
print(cursor.getData())
cursor=cursor.getNext()

book1=("abc", "Peter")
book2=("def", "James")
book3=("ghi", "Sam")
book4=("jkl", "Tom")
book5=("mno", "Jessie")

a = Node(book1)
b = Node(book2)
c = Node(book3)
d = Node(book4)

ll=LinkedList()
ll.AddBookToFront(b)
ll.AddBookToFront(a)
ll.insertAfter(ll.head.next, book4)
ll.AddBookAtPosition(book5, 3)

ll.printAll()

But I am still seeing an error like below..

Traceback (most recent call last):
File "C:\Users\TP_baseline\Desktop\DSAG\ProjectTest2.py", line 75, in <module>
ll.AddBookAtPosition(book5, 3)
File "C:\Users\TP_baseline\Desktop\DSAG\ProjectTest2.py", line 49, in AddBookAtPosition
head=head.getNext
AttributeError: 'function' object has no attribute 'getNext'

I am not sure if this is the right correction that you had suggested me to take. Any extra guidance would be greatly appreciated.