Question: what is the first book in the magnus chase series
[{'answer': 'The Sword of Summer', 'provenance': [{'wikipedia_id': '44014096', 'title': 'Magnus Chase and the Gods of Asgard', 'start_paragraph_id': 1, 'start_character': 331, 'end_paragraph_id': 1, 'end_character': 350, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44014096', 'title': 'Magnus Chase and the Gods of Asgard', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 529, 'bleu_score': 0.8745100535679871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 960672616527741830}, 'section': 'Section::::Abstract.'}]}]