Alida
thanks for being careful to follow the spam rules on our board.
I think it's fine if you give the title & author of the book you mentioned, since you're not selling it....we have boards here where we post books we are reading etc.
It's not like you said, HEY! Buy this book at my website (where I make a profit on it)
As far as teeth clenching, I don't know if I do it at night. The dentist is aware that I do it but he says there's no damage at this point....it might be more during the day!