You can download the latest versions of all your Leanpub books in your library here:

https://leanpub.com/user_dashboard/library.

You can sign in to Leanpub or reset your password here:

https://leanpub.com/login

If you can find the download email we sent to you when you made the purchase, the download links in that email will always point to the latest version of the book, so you can use those download links to get the latest version of the book.

If you don't see the book in your Leanpub library, you may be signed in to the wrong Leanpub account.

If you discover you have accidentally created more than one Leanpub account, here are some instructions for merging accounts:

http://help.leanpub.com/reader-help/i-have-two-accounts-i-would-like-to-merge-them-into-one-account-how-can-i-do-this

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Interested in creating your first Leanpub book? Here are some quick tutorials for our most popular writing modes: http://help.leanpub.com/en/articles/3088382-quick-walkthroughs-for-getting-started-on-a-leanpub-book