To add to the good tips from CommonSense,

- Do the full PhotoRead step (#3) on each volume once a day for one week.
- Activate one volume at a time in 30-minute passes. Do all the techniques. Dip into any topic you are interested in. Move through the entire volume beginning-to-end in each 30-minute pass, so you "burn in" new pathways into where the entire book was absorbed into your "other-than-conscious" mind.

Let us know how that works for you.