Machinations — Frank Carey

The Mechanoid Iona is back, but this time she has the evil mad scientist Dr. Zoe Muntz with her. Now Olly must face the ultimate danger from his past while stopping their nefarious plans.

If you like tech-heavy sci-fi and adventure, you'll love the second book in Frank Carey's Olly versus the Mechaniods series. Don't wait 200 years to enjoy it.