Quizzer Books Owlet books from Mills and Boon Distributor Macmillan Company of India.   Mills and Boon get associated only too obviously with those gushing romantic novels which titillate female hearts of all ages. But they are apparently diversifying, as all good business enterprises must to spread around their risks. The Quizzer Series are a set of question and answer booklets—between 32 and 50 pages in length—on subjects as divergent as Animals, Cars, The Sea, Weather, Energy, Reptiles, Mountains, The World, Inventors, Railways and Dogs. The one on The Sea, for instance, in­forms us why the Red Sea is red—this colouration is caused by tiny plant or­ganisms present in these waters called Trichodesmium. The Black Sea, however, is so coloured due to the presence of iron sulphide. What is a Coelacanth? A living fossil. The existence of this fish was only discovered in 1938. It can use its fins like limbs. An ancestor of this fish left the seas sometime in the geological past, and evolved into amphibians, reptiles, mam­mals and birds. Then, there are odd bits of information about things one always wanted to find out about. The electric ray can generate electric power upto 80 volts to stun its prey. The electric eel can produce upto 300 volts. The booklet on Weather contains the expected information on the highest recorded temperature (58°C at AI Azizi­yah, in Libya, on September 13, 1922), coldest known place (Vostok in Antarctica, which recorded—88.3°C on August 24, 1960), and longest drought (Atacama Desert in Chile, where it has not rained for at least the last 400 years). There is also a lucid explanation of the complex interplay of natural phenomena which influence weather, and a chart which displays the various types of clouds that are found in the sky, and the weather they portend.      One expects that the information set forth would be updated in subsequent editions of the Quizzer books. The one entitled The World, for instance, shows South Vietnam and Timor as separate countries. Regrettably, some maps in this booklet show Sumatra linked to main­land Asia and Java merged into Sumatra. It would be unfair to point out the British emphasis in the data presented, which is only to be expected. Most of the information, however, is truly uni­versal in character. Profusely illustrated with pictures and charts, printed in large, easy-to-read type, and priced at 60p each, these book­lets would be ...