All those books are scheduled for the second half of this year, so it is still a bit until they are released…
(if you understand Japanese you may have a look at amazon.co.jp, as there are already two CakePHP books available in Japanese)
Update (2008-04-08): There is another German CakePHP book coming with the title “Webentwicklung mit CakePHP.
Update (2008-08-10): The books Beginning CakePHP: From Novice to Professional and CakePHP Application Development have been released and are now available via Amazon (or other book stores). Another English CakePHP book is also coming soon: Practical CakePHP Projects.