Merge branch 'assignment-2.1' into 'master'

<assignment-2.1>

See merge request !1

Tests/testData.json

+{
+  "test_data1": {"type": "book",
+                  "book_url": "https://www.goodreads.com/book/show/38746485-becoming",
+                  "title": "Becoming",
+                  "id": "38746485",
+                  "ISBN": "0",
+                  "author_url": "https://www.goodreads.com/author/show/2338628.Michelle_Obama",
+                  "author": "Michelle Obama",
+                  "rating": 4.52,
+                  "rating_count": 661305,
+                  "review_count": 54516,
+                  "image_url": "https://i.gr-assets.com/images/S/compressed.photo.goodreads.com/books/1528206996l/38746485.jpg",
+                  "similar_books": ["Becoming",
+                                    "Educated",
+                                    "Born a Crime: Stories From a South African Childhood",
+                                    "More Than Love, A Husband's Tale",
+                                    "I Am Malala: The Story of the Girl Who Stood Up for Education and Was Shot by the Taliban",
+                                    "Untamed",
+                                    "Where the Crawdads Sing",
+                                    "A Promised Land",
+                                    "Dreams from My Father: A Story of Race and Inheritance",
+                                    "Drum Beats, Heart Beats (Dancing Soul Trilogy, #3)",
+                                    "Eat, Pray, Love",
+                                    "Losing Jon: A Teen's Tragic Death, a Police Cover-Up, a Community's Fight for Justice",
+                                    "I Know Why the Caged Bird Sings (Maya Angelou's Autobiography, #1)",
+                                    "The Vanishing Half",
+                                    "Self Made: Inspired by the Life of Madam C.J. Walker",
+                                    "Bossypants",
+                                    "The Audacity of Hope: Thoughts on Reclaiming the American Dream",
+                                    "Such a Fun Age",
+                                    "Between the World and Me",
+                                    "Black Fortunes: The Story of the First Six African Americans Who Escaped Slavery and Became Millionaires",
+                                    "Little Fires Everywhere"]}
+}
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