BIGGLES FLIES AGAIN WAS PUBLISHED AS PENGUIN BOOK NUMBER 348 ON 25th NOVEMBER 1941
The book had 128 pages and was printed by Hunt, Barnard and Co. Ltd. It cost 6d (that is half a shilling)
I understand there are two different types of back to the book. One with the ‘Genasprin’ advert as above and one that is just plain white.