8 books
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
The Invisible Library
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Swoonstack Readers
Books in this Series
8 Titles
Book 1
Book 1
Book 2
Book 2
Book 3
Book 3
Book 4
Book 4
Book 5
Book 5
Book 6
Book 6
Book 7
Book 7
Book 8
Book 8