A PHP Error was encountered

Severity: Warning

Message: Missing argument 1 for Book::a()

Filename: controllers/Book.php

Line Number: 189

Backtrace:

File: /home/admin/web/im-reader.com/public_html/application/controllers/Book.php
Line: 189
Function: _error_handler

File: /home/admin/web/im-reader.com/public_html/index.php
Line: 316
Function: require_once

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