how to prevent backslash while writing json file in pyspark

I need to write a data into json file like in the below format using pyspark.

{
"list-item": [
    {
    {"author":"author1","title":"title1","pages":1,"email":"author1@gmail.com"},
    {
    {"author":"author2","title":"title2","pages":2,"email":"author2@gmail.com"},
    {
    {"author":"author3","title":"title3","pages":3,"email":"author3@gmail.com"},
    {
    {"author":"author4","title":"title4","pages":4,"email":"author4@gmail.com"},
  ],

  
  ],
"version": 1
}

I have written the below pyspark code but it write "" and adding "" at the beginning and end of each item. How to remove the backslash and double quote

import sys

from pyspark.sql import SparkSession

from pyspark.sql.types import *

from pyspark.sql.functions import col,to_json,struct,collect_list,lit

from datetime import datetime

from time import time

if __name__ == '__main__':
    spark = SparkSession.builder.appName(
    spark = SparkSession.builder.appName("Test").enableHiveSupport().getOrCreate()

    schema = StructType([
        StructField(
    schema = StructType([
        StructField("author", StringType(), False),
        StructField(
        StructField("title", StringType(), False),
        StructField(
        StructField("pages", IntegerType(), False),
        StructField(
        StructField("email", StringType(), False)
    ])
    data = [
        [
    ])
    data = [
        ["author1", "title1", 1, "author1@gmail.com"],
        [
        ["author2", "title2", 2, "author2@gmail.com"],
        [
        ["author3", "title3", 3, "author3@gmail.com"],
        [
        ["author4", "title4", 4, "author4@gmail.com"]
    ]

    df = spark.createDataFrame(data, schema)
    df=df.select(to_json(struct(
    ]
    df = spark.createDataFrame(data, schema)
    df=df.select(to_json(struct("author", "title", "pages", "email")).alias("json-data")).agg(collect_list("json-data").alias("list-item"))
    df=df.withColumn(
    df=df.withColumn("version",lit("1.0").cast(IntegerType()))
    df.printSchema()
    df.show(
    df.printSchema()
    df.show(2, False)
    curDT = datetime.now()
    targetPath = curDT.strftime("%m-%d-%Y-%H-%M-%S")
    df.write.
    df.write.format("json").mode("overwrite").option("escape", "").save(targetPath)

my code writes the json with backslash and double quote enclosed each item like below.how to remove those.Please help

{"list-item":["{\"author\":\"author1\",\"title\":\"title1\",\"pages\":1,\"email\":\"author1@gmail.com\"}","{\"author\":\"author2\",\"title\":\"title2\",\"pages\":2,\"email\":\"author2@gmail.com\"}","{\"author\":\"author3\",\"title\":\"title3\",\"pages\\":3,\"email\":\"author3@gmail.com\\"}","{\"author\":\"author4\",\"title\":\"title4\",\"pages\":4,\"email\":\"author4@gmail.com\"}"],"version":1}