FAA Commercial helicopter add on
Just want to get some information on what books i need to get for the helicopter add on i got the PHAK, FAR/AIM 2013, weather and instrument books but wondering if i need to get the collective/cyclic book, principle of helicopter fight (which i been reading though on the FAA website as a PDF) etc so if anyone can tell me the books that i really do need to purchase and have in my possession so that i can start doing some homework ahead of time before starting the course.
Also to the people that hold fixed and helicopter ratings do you just log your hours in one book or would it be best and easier to get another log book and keep one for fixed wing and one for helicopter??? any ideas would be much appreciated.
thanks for the help
Safe flying