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diff --git a/your-code/Open Notebook.onetoc2 b/your-code/Open Notebook.onetoc2
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diff --git a/your-code/solutions.sql b/your-code/solutions.sql
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+++ b/your-code/solutions.sql
@@ -0,0 +1,95 @@
+SELECT *
+FROM courses.authors;
+
+SELECT *
+FROM courses.titles;
+
+SELECT *
+FROM courses.publishers;
+
+SELECT *
+FROM courses.titleauthor ;
+
+/*Challenge 1 - Who Have Published What At Where?*/
+SELECT
+  authors.au_id AS 'AUTHOR ID',
+  authors.au_fname AS 'LAST NAME',
+  authors.au_lname AS 'FIRST NAME',
+  titles.title AS 'TITLE',
+  publishers.pub_name AS 'PUBLISHER'
+FROM
+  courses.authors
+INNER JOIN
+  courses.titleauthor ON authors.au_id = titleauthor.au_id
+INNER JOIN
+  courses.titles ON titleauthor.title_id = titles.title_id
+INNER JOIN
+  courses.publishers ON titles.pub_id = publishers.pub_id;
+
+/*Challenge 2 - Who Have Published How Many At Where?*/
+SELECT
+  authors.au_id AS 'AUTHOR ID',
+  authors.au_fname AS 'LAST NAME',
+  authors.au_lname AS 'FIRST NAME',
+  publishers.pub_name AS 'PUBLISHER',
+  COUNT(*) AS 'TITLE COUNT'
+FROM
+  courses.authors
+INNER JOIN
+  courses.titleauthor ON authors.au_id = titleauthor.au_id
+INNER JOIN
+  courses.titles ON titleauthor.title_id = titles.title_id
+INNER JOIN
+  courses.publishers ON titles.pub_id = publishers.pub_id
+GROUP BY
+  authors.au_id,
+  authors.au_fname,
+  authors.au_lname,
+  publishers.pub_name;
+
+/*Challenge 3 - Best Selling Authors*/
+SELECT
+  authors.au_id AS 'AUTHOR ID',
+  authors.au_fname AS 'LAST NAME',
+  authors.au_lname AS 'FIRST NAME',
+  publishers.pub_name AS 'PUBLISHER',
+  COUNT(*) AS 'TOTAL'
+FROM
+  courses.authors
+INNER JOIN
+  courses.titleauthor ON authors.au_id = titleauthor.au_id
+INNER JOIN
+  courses.titles ON titleauthor.title_id = titles.title_id
+INNER JOIN
+  courses.publishers ON titles.pub_id = publishers.pub_id
+GROUP BY
+  authors.au_id,
+  authors.au_fname,
+  authors.au_lname,
+  publishers.pub_name
+ORDER BY
+  TOTAL DESC
+LIMIT 3;
+
+/*Challenge 4 - Best Selling Authors Ranking*/
+SELECT
+  authors.au_id AS 'AUTHOR ID',
+  authors.au_fname AS 'LAST NAME',
+  authors.au_lname AS 'FIRST NAME',
+  publishers.pub_name AS 'PUBLISHER',
+  COUNT(*) AS 'TOTAL'
+FROM
+  courses.authors
+INNER JOIN
+  courses.titleauthor ON authors.au_id = titleauthor.au_id
+INNER JOIN
+  courses.titles ON titleauthor.title_id = titles.title_id
+INNER JOIN
+  courses.publishers ON titles.pub_id = publishers.pub_id
+GROUP BY
+  authors.au_id,
+  authors.au_fname,
+  authors.au_lname,
+  publishers.pub_name
+ORDER BY
+  TOTAL DESC;
\ No newline at end of file