Solved it, mybooktable/includes/templates.php
comment out two lines with mbt_templates_init() function
The two lines are found in the mbt_templates_init() function and are located under single book hooks. They are:
-add_action(‘mbt_single_book_storefront_overview’, ‘mbt_do_single_book_storefront_overview’);
-add_action(‘mbt_single_book_singlecolumn_overview’, ‘mbt_do_single_book_singlecolumn_overview’);
