Ebook Central, one of our largest ebook collections, will be unavailable for a short time this weekend while they carry out vital maintenance on the platform. It will not be available during the following time early on Sunday morning:

Sunday, 22 April, 4:00 a.m. until Sunday, 22 April, 9:00 a.m.

The timing of this work so early in the day should hopefully mean that as few people as possible are inconvenienced, but we apologise nonetheless for the interruption.