Explicit Chemistry and Biology combined 2 in 1 Package contains A Revision Course" for WAEC, NECO, UTME, POST-UTME and other related examinations written by O.J. Olaoye are complementary texts to the various textbooks that have been written on those subjects area. These books are timely in view of the poor results that are being witnessed in the UTME, WAEC, NECO, GCE, POST UTME examinations especially in the sciences and mathematics including  Chemistry and biology. These majorly are due to poor or inadequate access to good study materials. Each chapter has annotated topics followed by copious specimen questions on some past UTME and POST -UTME examination, for practice and emphasis. The topics in each chapter are adequately treated and with clarity. The illustrations are simple but effective. The author has done a lot of work and put in efforts to come out with a very readable and useful text. It is highly recommended to all the students aspiring to undertake WAEC, NECO, UTME and POST-UTME examination, in order to improve highly their chances of success