ouch... that doesn't sound good.
hmm.. I think k3flasher is an option but it's a "radical procedure" if you don't have a 3.3 backup (which I presume you do not)
The only option I can think of however.
I just did this recently (did I write it up? possibly)
in essence:
get a de-bricking image (3.0.x is available I think)
apply via k3flasher - (which in itself has a learning curve, thread is easily found)
then update incrementally to 3.3 (mine actually just jumped to 3.3 for some reason when I applied the Amazon update, I'm sure I documented that somewhere)
Then... well since your 3.4 OTA update already delivered... that should be it.
This procedure IF DONE CORRECTLY won't lose your books etc.
Sorry mate. best I can think of. HTH
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