Classical Guitar Tutor (Book)

[Saint Richie]

Hi All
I'm looking for an all round classical guitar book that can help fill in the gaps in my knowledge.
It's mainly technique that I'm looking at, as well as practicing scales in various positions etc.
I've done all four of the Guitarists Way books and am currently just going through the Trinity Grade 2 book, just learning the tunes in there but I find that I have gaps in my knowledge and would appreciate what others can suggest

Many thanks