Transfer iBooks from my account to my wifes account

Hello Apple Community,

I am wondering, for as long as we have had apple devices everything was on the one apple account.

Having our devices on the one account was causing issues with storage etc etc. My wife has created her own account. So our devices are now on separate accounts.

I am wondering if it is possible to transfer all her ibooks purchased on my account to her account, so she doesn't have to login download they book she wants, log out, then login again.

Many thanks for your time.