How does one separate the pages, then dry them (apart and under something heavy)?
I would suggest carefully removing the staples and separate the pages to dry.
I might try an iron on low heat to try to combat the severe wrinkling. [experiment on a less valuable/less loved booklet to see if it is more destructive than it is helpful]
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THIS BAG IS NOT A TOY
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375 Reasons why I drive A 1991 Cavalier.