global class HandleBooksBatchableClass implements Database.Batchable<SObject> {

	global HandleBooksBatchableClass() {

	}

	/**
	 * @description gets invoked when the batch job starts
	 * @param context contains the job ID
	 * @returns the record set as a QueryLocator object that will be batched for execution
	 */
	global Database.QueryLocator start(Database.BatchableContext context) {
		return Database.getQueryLocator('SELECT Id, Name, Author__c FROM Book__c WHERE Author__c != null');
	}

	/**
	 * @description gets invoked when the batch job executes and operates on one batch of records. Contains or calls the main execution logic for the batch job.
	 * @param context contains the job ID
	 * @param scope contains the batch of records to process.
	 */
   	global void execute(Database.BatchableContext context, List<Book__c> scope) {
		Map<id, Book__c> books = new Map<id, Book__c>(scope);

		Map<id, BooksToWriters__c> booksWithWriters = new Map<id, BooksToWriters__c>([Select Id, Book__c From BooksToWriters__c WHERE Book__c in books.values()]);

		for(BooksToWriters__c bookExists :booksWithWriters){
				books.remove(bookExists.Book__c.Id);
		}


		Set<string> writersNames = new Set<string>();
		for(Book__c bookAuthor : books.values()){
			writersNames = bookAuthor.Author;
		}
		List<Writer__c> writers = [Select id, Name From Writer__c Where Name IN :writersNames];

		Map<Book__c, Writer__c> booksAndAuthors = new Map<Book__c, Writer__c> ();
		for(



		List<BooksToWriters__c> newBooksToWriters = new List<BooksToWriters__c>();

		for(Book__c bookToSetAuthor : books.values()){
			newBooksToWriters.add(new BooksToWriters__c(Book__c = bookToSetAuthor, Writer__c = ));
		}
	}

	/**
	 * @description gets invoked when the batch job finishes. Place any clean up code in this method.
	 * @param context contains the job ID
	 */
	global void finish(Database.BatchableContext context) {

	}
}