READ ME: you need to put the command block you paste this into to 'repeat' and 'always active'
a basic command to add more tomes.
instructions:
get a villager to walk over lapis ore and it will turn into a tome trader which will trade 8 tomes (and you can find a secret 9th if you are lucky.....)
installation:
1)play minecraft 1.9
2)give yourself a command block
3)copy and pastin the command (make sure it is on 'repeat' and 'always active'
4)enjoy