Important note by Simeon Oka, Editor-in-Chief of the journal Thermal Science Editor-in-Chief of the journal Thermal Science request that it is necessary to retract paper RESEARCH IN ENTROPY WONDERLAND A Review of the Entropy Concept by Marko E. POPOVIĆ, Department of Chemistry and Biochemistry, Brigham Young University, Provo, Ut., USA, Original scientific paper, https://doi.org/10.2298/TSCI180115012P, Published in the journal Thermal Science, Vol. 22, Year 2018, No. 2, pp. 1163-1178, since, author find unacceptable errors that have to be corrected by future research. Link to the retracted article 10.2298/TSCI180115012P