#1
I'm learning grades so obviously the books from my grade and onward are key for that but I've heard a few other books are good for learning things when not in lesson or whether free alternatives on the internet are available. I play metal, prog rock, math rock and looking to learn funk, jazz and classical. Books I've heard are good are
How to write songs on Guitar by Rikky Rooksby,
The Frank Zappa Guitar Book,
Creative Guitar 1/2 by Guthrie Govan,
French Guitar cookbook,
Real Book 1988,
Beato book by Rick Beato,

Are these worth buying, if not what else should I learn from
95% Guitar player. 5% Piano player
Playing guitar 1 year
Grade 3/8 - Aiming for grade 6 by next August
Metal, Prog, Jazz, and Math Rock.

Guitars:
Ibanez SZ320 - Drop C -Black,
Jackson Misha HT7 - Standard - also Black,

Amp:
Ironheart IRT Studio 15w Head (I like black),
Ironheart 2x12 Cab (once you go black).
#2
It really depends what you want out of a book as much as anything else.  I mean, a Real Book is a good thing to learn songs from... but that's all it is, a series of chord charts and such for jazz standards.

So the question is... what do you want from a book?
R.I.P. My Signature. Lost to us in the great Signature Massacre of 2014.

Quote by Master Foo
“A man who mistakes secrets for knowledge is like a man who, seeking light, hugs a candle so closely that he smothers it and burns his hand.”


Album.
Legion.
#3
Zaphod_Beeblebr Stuff that improves either my theory, knowledge, songwriting, or technique that isn't information i can easily find online for free. I've heard a real book is a must but there are tabs for most of the songs although I don't know how accurate and it has all the right information in one place.
95% Guitar player. 5% Piano player
Playing guitar 1 year
Grade 3/8 - Aiming for grade 6 by next August
Metal, Prog, Jazz, and Math Rock.

Guitars:
Ibanez SZ320 - Drop C -Black,
Jackson Misha HT7 - Standard - also Black,

Amp:
Ironheart IRT Studio 15w Head (I like black),
Ironheart 2x12 Cab (once you go black).