If you do syntopic reading and you feel that you would like to activate a particular book do so. You most certainly do not need to activate every book for writing reports etc or any book for direct learning.
If you want to go the direct learning path, give it time to appear in your life. It is more often than not subtle in appearing in your life you most probably don't notice that you are applying what you learnt since you haven't activated it. You might be pulled back to a particular book at a later date to activate it... just so you can know what you learnt.
Alex
