Holobook is likely misspelled.
Holobook has no English definition.
As a noun fa is
a syllable used in solfège to represent the fourth note of a major scale.
As an initialism FA is
football Association esp English Football Association see also Scottish FA and Welsh FA.
holobook
Not English
Holobook has no English definition. It may be misspelled.
fa
English
Alternative forms
* fah
Noun
(
en noun)
(music) A syllable used in to represent the fourth note of a major scale.
See also
* do
* la
* mi
* re
* so
* ti