I recommend the book “City of Thieves”. It is a 2008 historical fiction novel by David Benioff. It is, in part, a coming of age story set in the World War II siege of Leningrad. It follows the adventures of two youths as they desperately search for a dozen eggs at the behest of a Soviet NKVD officer for a birthday gift, a task that takes them far behind enemy lines.
Thanks. I can't wait to get my hands on this book!