1.Download project from GitHub. 

2. Open the folder by clicking the "new" button in unity hub.

3. Go to the address of the extracted folder.

4. Select the folder.

5. Click on the play button in unity. 

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if there's a problem that unity says that object instance not found then go to the Image targets for fron and back cover and drag and drop the following objects as shown in images below.

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Put the drag and drop the objects from the scene in scripts of ImageTarget_Fc object as following image:-