All together and According to the book

All together adverb - Used of a group whose members acted or were acted upon collectively and when `all' and `together' can be separated by other words.

According to the book and all together are semantically related. In some cases you can use "According to the book" instead an adjective phrase "All together".

All together and according to the book are semantically related. Sometimes you can use "All together" instead an adjective phrase "According to the book".