Legendary drum & bass magazine Knowledge returns for a one-off special book to celebrate their 25th anniversary. It's been ten years since the last issue and five years since they called it a day and over the years people have clamoured for it's return but Knowledge always resisted the temptation. So why are they bringing it back now? Well, they feel they have unfinished business. Reaching 20 years was such an important milestone but it was a bittersweet moment and they didn't celebrate it at all because they knew the end was coming. What better way to mark their 25th anniversary than with one last issue? At first, they considered doing a magazine but they want to make it really special so they decided to publish a super deluxe book.