Falcon: Year Zero

Tony Falcon is back when deadly viruses are released and an apocalyptic ransom is delivered to the UN. Teaming up with old colleagues from MI6 on the same trail, they find themselves in action across Spain, France and the Caribbean in a race to stop an even more deadly attack. 

Book 3 of 3. This book can be read as a stand-alone story but is best enjoyed as the third in the series.