1. Prevent severe changes in humidity by keeping your magic portal in a plastic bag.

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2. When not in use, keep pressure on both covers. Keeping it on a bookshelf between other books or in a pile of other books can achieve this.

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3. If your magic portal has suffered warpage, fear not!

Here's a great video on how to straighten it out:

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Straightening Warped Hardbacks | Book Care 101 - YouTube

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