If you want to ask about ebooks, try the reader zone: General here on PTS. There is no process for retrieving books from this site because no book is hosted on this site.
Edited to add: To fully explain PTS policy please read:
NOTICE: Discontinuation of eBooks hosting on PTS Website
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LoginAnd a post about linking to books:
You are not allowed to view links.
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LoginIf you want to ask about the book for Tuebl, use the Tuebl support: Book Requests. There is a search posted under Tuebl support to see if your book is available on Tuebl already. If it is the process is simple. Click the link. go to the book's page, scroll down and look for the epub download. simply click that link.