In this clear and concise introduction to thermodynamics and statistical mechanics the reader‎,‎ who will have some previous exposure to thermodynamics‎,‎ will be guided through each of the two disciplines separately initially to provide an in‎-depth understanding of the area and thereafter the connection between the two is presented and discussed‎.‎ In addition‎,‎ mathematical techniques are introduced at appropriate times‎,‎ highlighting such use as‎:‎ exact and inexact differentials‎,‎ partial derivatives‎,‎ Caratheodory‎'‎s theorem‎,‎ Legendre transformation‎,‎ and combinatory analysis‎.‎ Emphasis is placed equally on fundamentals and applications Several problems are included