def book_page(request, pk):
    # Get book
    i_book = get_object_or_404(Book, pk=pk)
    # Get book text
    book = i_book.full_text.split()
    # On 1 page words
    paginator = Paginator(book, settings.COUNT_WORDS)
    # Get page
    page = request.GET.get('page')
    # Check on int(page)
    if not isinstance(page, int):
        if isinstance(page, str) and page.isdigit():
            page = int(page)
            pages = paginator.page(page)
        else:
            # if page != int -> open first page
            pages = paginator.page(1)
    return render(request, 'reader/view.html', {'book': i_book, 'pages': pages})