I have to say, of all the ATPL books/notes I have seen, which includes Oxford, Nordian, Bristol CBT /notes and Jeppesen Atlantic version, I find the Jeppesen books the best, and easiest to understand, without loads of nonsense!
The Oxford books are great, but they do certain areas go to much in to minute details, the Nordian books, I prefer not to comment on, Bristol is maybe a little to minimal, but not bad, however the Jeppesen books seems to be perfect, a pity they are more or less obsolete as it seems not many are using them anymore.