It doesn't work like that, Newcastle Uni. Sorry. The American editions can be as much as 100 or 200 pages longer than the British and Canadian ones, which use smaller type and less space between lines.
The British and Canadian ones are environment friendly and printed on recycled paper. The American editions are nothing like that. (I know environmentally conscious Americans who have ordered the Canadian edition for this reason.)
Forgive me, please, for not thumbing through book six, but I have stayed away from all chat about the plot and want to be surprised. SURELY SOMEONE ELSE HAS READ THE BOOK AND CAN REPRINT THE PASSAGE IN QUESTION. (Please?)
As a consolation, here is the the Rictusempra spell from page 192 of the American edition of Harry Potter and the Chamber of Secrets (Book 2). I had remembered incorrectly; the tickling spell was cast during a magic dueling class.
I know it is not F/M, as the one in book six is, but it does tell you how the spell works and you can imagine using it on any female you choose--or imagine that she has used it on you.
--------------------------------
...Harry pointed his wand straight at Malfoy and shouted, "Rictusempra!"
A jet of silver light hit Malfoy in the stomach, and he doubled up, wheezing.
"I said disarm only!" Lockhart shouted in alarm over the heads of the battling crowd, as Malfoy sank to his knees; Harry had hit him with a Tickling Charm, and he could barely move for laughing...