Overall, the book is more about Worf and the XO post than about the Borg (though the Borg aspect might be the clearer in the next novels). If you have been spoiled by ST:TTN, ST:VGD, ST
S9R, you may find the book just average.
Picard:
The Borg:
Question(s):

Picard:
- in a “ship” with Crusher
- hears and determines the what/where/why/when of Borg are up to (and becomes Locutus again)
- disobeys Adm Janeway by not waiting for 7 of 9 in investigating the Borg
- helps Worf come to terms with his actions in Soukara (DS9: Change of Heart)
- finds a new way to defeat the Borg, kills Borg Queen
- didn't do much except deactivating B4
- built a cloaking device
- still E-E temp XO when he refused to accept the post again when offered (as approved by Starfleet) but eventually accepts the post.
- T'Lana
- Vulcan, new ships counselor
- Worf
- ex-Security Chief, now Conn officer
- ala Sito Jaxa (Worf's sparring partner and fate)
- Security Chief but doesn't last long
The Borg:
- attacks on sight (explained as protecting the creation of their new Queen)
- more vicious – cuts up the away team and beamed back the pieces to sickbay
Question(s):
- How come it took the Borg a while to create a new Queen since what happened in Endgame, Homecoming, and The Father Shore?
- Cloaking device specs in their ships computers? What gives?