any recommendations? or something that you know it's reliable, couple brands i am considering, mel bay and berklee.
berklee i would back, i use their books for learning (not necessarily improv, but others and such) and they work for me.
the guitar grimoire : progressions and improvisation by Adam kadmon
does anyone has the chord wheel, tell me about it.
no, there's book very popular, called The Chord Wheel, not sure if it's a book, it called it a device. selling in amazon.