1)I think A is possibly the easiest and most obvious of all the letters. (Oh Dear!). Because it is, of course, ANGELS. This is in the title of my book because most people who think about these things at all, think they might have a 'guardian angel'. Actually, they may have a 'spirit guide' to look after them here in Earth School, angels are far higher beings and don't usually do mundane things like trying to persuade humans to listen to good advice, and rewarding them with an occasional parking space! Read all about my 'angels' trials and tribulations in Despite the Angels.
2)I am Madeline A Stringer because I was advised against using my whole name. My middle name is Ann, after a greatgreatgreat etc grandmother who was apparently a bit of a character. She was Ann Walters, lived around 1820, in the other half of Shakespeare's house (the half you don't get shown) in Stratford on Avon. We have all been given some part of her name, and been christened in the broderie-anglaise robe she hand made. I was known as Ann for my first 17 years, so am fond of that 'A'.
3)Aconite: a great homoeopathic remedy for shock and fright.