diff --git a/.DS_Store b/.DS_Store
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diff --git a/solutions.sql b/solutions.sql
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+##Challenge 1 - Who Have Published What At Where?
+SELECT a.au_id AS 'AUTHOR ID', 
+a.au_lname AS 'LAST NAME', 
+a.au_fname AS 'FIRST NAME',
+t.title AS 'TITLE',
+p.pub_name AS 'PUBLISHER'
+FROM authors a
+JOIN titleauthor ta
+ON  a.au_id = ta.au_id
+JOIN titles t
+ON ta.title_id = t.title_id
+JOIN publishers p
+ON t.pub_id = p.pub_id;
+
+##Challenge 2 - Who Have Published How Many At Where?
+SELECT a.au_id AS 'AUTHOR ID', 
+a.au_lname AS 'LAST NAME', 
+a.au_fname AS 'FIRST NAME',
+p.pub_name AS 'PUBLISHER',
+COUNT(t.title) AS 'TITLE COUNT'
+FROM authors a
+JOIN titleauthor ta
+ON  a.au_id = ta.au_id
+JOIN titles t
+ON ta.title_id = t.title_id
+JOIN publishers p
+ON t.pub_id = p.pub_id
+GROUP BY title;
+
+##Challenge 3 - Best Selling Authors
+SELECT a.au_id AS 'AUTHOR ID', 
+a.au_lname AS 'LAST NAME', 
+a.au_fname AS 'FIRST NAME',
+SUM(s.qty) AS 'TOTAL'
+FROM authors a
+JOIN titleauthor ta
+ON  a.au_id = ta.au_id
+JOIN sales s
+ON s.title_id = ta.title_id
+GROUP BY a.au_id
+ORDER BY TOTAL DESC
+LIMIT 3;
+
+##Challenge 4 - Best Selling Authors Ranking
+SELECT a.au_id AS 'AUTHOR ID', 
+a.au_lname AS 'LAST NAME', 
+a.au_fname AS 'FIRST NAME',
+SUM(IFNULL(s.qty,0)) AS 'TOTAL'
+FROM authors a
+LEFT JOIN titleauthor ta
+ON  a.au_id = ta.au_id
+LEFT JOIN sales s
+ON s.title_id = ta.title_id
+GROUP BY a.au_id
+ORDER BY TOTAL DESC;
+
+##Bonus 4 - Most Profiting Authors
+SELECT a.au_id AS 'AUTHOR ID', 
+a.au_lname AS 'LAST NAME', 
+a.au_fname AS 'FIRST NAME',
+SUM(t.advance + ta.royaltyper) AS 'PROFIT'
+FROM authors a
+JOIN titleauthor ta
+ON  a.au_id = ta.au_id
+JOIN titles t
+ON ta.title_id = t.title_id
+GROUP BY a.au_id
+ORDER BY PROFIT DESC
+LIMIT 3;
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