Four and half minutes in to The Bells Of St John, the eagled eyed Doctor Who fans would have spotted this little nugget...
Clara takes this book off Artie the son of a family friend whom she is the nanny of (a role simlar to that of herself in 19th Century England). As you can see, the book is written by the Doctor's former companion Amelia (Amy) Williams (Pond).
Clara asks Artie: "What chapter are you on?"
Clara:"Eleven is the best. You'll cry your eyes out"
Is that a hint that something sad is going to happen to the Doctor? With him being in his eleventh body? Does the title of the book SUMMER FALLS imply what is to come? The fall of the eleventh perhaps? Knowing now how the Moff writes Doctor Who;I think we're in for an emotional rollercoaster over these coming weeks.
Could we be seeing more of these type of conections with Amy and Rory too throughout the remaining half of Series 33 (7)? In the Christmas episode The Snowmen, Clara had to choose just one owrd to attract the attention of the Doctor; and that word was POND. We just have to watch the mystery unravel and discover the truth to Clara Oswald in episode 13.