Change Ibooks library path

Hello guys!

doubt: can i change the library path of iBook?

i have a sad 120gb has 17/15 gb free .

I changed iTunes, many others library caches ( work with adobe programs) to external HD

But i have many books that i want to sync with my iPhone 7plus but i have no space on my main hd!

tried with Symbolic Link and native OS X command "Make Alias " and didnt work =/

Any ideas?

thankxx