Law:

• Brownlie, Ian: The rule of law in international affairs
• Jellum, Linda D. - Hricik, David Charles: Modern statutory interpretation
• Studia iurisprudentiae doctorandorum Miskolciensium

Natural sciences:

• Child, Dennis: The essentials of factor analysis 
• Treloar, L. R. G.: The physics of rubber elasticity

Marketing, management:

• Handbook of knowledge and economics
• Yeh-Yun Lin, Carol - Edvinsson, Leif: National intellectual capital

Engineering:

• Edelmayer András: Fault detection in dynamic systems: from state estimation to direct input reconstruction

Informatics:

• Sziray József: Test design of digital systems 

Other:

• Languages in a global world
• MBTI manual
• Similarity and categorization