Delete book from iBooks Mac when I delete it from iOS
Unfortunately that's not possible. iCloud will auto-download books to Mac-any book you buy on your iPod will pop up on your Mac, and vice-versa. But no, you can't auto-delete books on Mac every time you do so on iPod.

However, you can hide your iCloud-stored titles from appearing on the iBooks shelf. 


Select the "All Books" drop-down.





Swipe the "Hide iCloud Books" thing.




You'll end up with this. The shelf's empty because I haven't downloaded any book yet. Redo steps 1 and 2 to make it reappear. 



On the Mac, go to iBooks' settings to do the same.