内容简介一项挑战自然、战胜自我的新型体育运动项目。了解并加入它，打造更好的自己。作者简介作者戴尔·沃勒在圣路易斯长大，现居匹兹堡。他曾在海军服役，目前是一名核能工程师，写作是他的兼职工作之一。他自2013年开始出版创作，至今已有百本涉及人文社科领域各类话题的作品与读者见面。
Availability can change throughout the month based on the library's budget. You can still place a hold on the title, and your hold will be automatically filled as soon as the title is available again.
The OverDrive Read format of this ebook has professional narration that plays while you read in your browser. Learn more here.
Your session has expired. Please sign in again so you can continue to borrow titles and access your Loans, Wish list, and Holds pages.
If you're still having trouble, follow these steps to sign in.
Add a library card to your account to borrow titles, place holds, and add titles to your wish list.
Have a card? Add it now to start borrowing from the collection.
The library card you previously added can't be used to complete this action. Please add your card again, or add a different card. If you receive an error message, please contact your library for help.