title_body: Best PDF app reader for iPad that emulates the paper book experience
upvoted_answer: take a look at ibouquiniste it seems to fit to the edges by default has a nice flip page animation 
  
  iBouquiniste Features Include:
  
  
  Supports notes
  Send books by email
  Unique Author Library (each author on their own bookshelf)
  View most recently opened books in the order you opened them
  Real page numbers
  Adjustable fonts, spacing, margins, book paper and more
  Download books via iTunes or any app supporting file transfer (i.e. Mail or Safari)
  OPDS catalogs support
  iBouquiniste Cloud Storage for synchronisation (books, reading positions, citations and bookmarks)