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Revert "Revert "Book10""

This reverts commit 5b821844115dff3bd3432c4f2ea6c2d7ce0fc7fe.
Revert "Revert "Book8""

This reverts commit be1142af3195f687b7c68d40103f79f879fa9759.
Revert "Revert "Book4""

This reverts commit 6e60e0275bd016c07e21ae0e4f458a493dd5097d.
Merge branch 'RecoverBooks'