I have not yet publshed a book for Radio Aids, but I am currently working on one. It wil be available in about three months or so.
If you cannot wait three months for the new book, the Radio Aids QA&E are available on my Interactive CD which covers all 14 of the JAR ATPL exam subjects. You can get this free with any of the UK-produced 1000 QA&E books from Stirling Books House Mumbai, or as a separate product from the same source.