Editing Ryuho Okawa (section)

====Publications====
A vast amount of literature has been dedicated to Happy Science's doctrine. Okawa said they all have the purpose of learning Happy Science's fundamental scripture, {{Nihongo|"The Dharma of the Right Mind"|正心法語|Shōshin Hōgo}}.<ref name=fukui2004p121>{{Harvnb|Fukui|2004|p=121}}</ref> Okawa's publications come in three different types.<ref name=fukui2004p120/> One are the books containing spiritual messages from Okawa's communication with various spirits.<ref name=fukui2004p120/> The second type are transcriptions of Okawa's lectures and seminar-talks. The third are Okawa's writings.<ref name=fukui2004p120/> Other authors have contributed as well. Okawa's wife, Kyoko, published books, mainly for the female audience. Some high-ranked disciples have produced titles. Others are published under the name of Happy Science or its Public Relations Department, which include books, magazines, comics, and textbooks.<ref name=fukui2004p120>{{Harvnb|Fukui|2004|p=120}}</ref>

Okawa was a prolific writer.<ref name=shields2009p50>{{Harvnb|Shields|2009|p=50}}</ref> By the early 1990s, he published about 20 to 30 books per year.<ref name=hotaka2012p144>{{Harvnb|Hotaka|2012|p=144}}</ref> He is said to have published over 300 books by 2004.<ref name=fukui2004p119/>

Many of Okawa's publications became best-sellers. This may have been influenced by a practice of adherents purchasing copies and giving them out for free to attempt to convert new members. A practice of placing new copies of Okawa's publications in street libraries has also been reported. {{efn|His 1991 books ''The Great Warning of Allah'' and ''The Terrifying Revelations of Nostradamus'' became best-sellers in that same year.<ref name=fukui2004p67 /> His 1999 books {{Nihongo|''The Laws of Prosperity''|繁栄の法|Han-ei no hō}} and {{Nihongo|''The Syndrome of the Unhappy''|幸福になれない症候群|Kōfuku-ni-Narenai Shōkō-gun}} reached fourth and twelfth respectively in that year's best-seller list.<ref name=fukui2004p125>{{Harvnb|Fukui|2004|p=125}}</ref> The release of the film ''The Laws of the Sun'' in 2000, based on the book with the same name, caused the book version to become a best-seller that same year.<ref name=fukui2004p121/> In 2001, {{Nihongo|''The Laws of Miracles''|奇蹟の法|Kiseki no Hō}} and {{Nihongo|''The Origin of Love''|愛の原点|Ai no Genten}} became the top ten best-sellers. In 2002, {{Nihongo|''The Laws of Triumph''|常勝の法|Jōshō no Hō}} was also a top ten best-seller.<ref name=fukui2004p125/>}} Some of Okawa's books sold over a million copies.<ref name=fukui2004p119/> Okawa's main book ''The Laws of the Sun'' has "sold" the most copies, with ten million reported sold by January 2000.<ref name=fukui2004pp119-120>{{Harvnb|Fukui|2004|pp=119–120}}</ref> Happy Science said that by 1997, over 50 million copies of its titles were reported sold worldwide.<ref name=fukui2004p120 />

Unlike traditional religious text, Okawa's writings are simple and written in casual language, like a generic self-help book.  This simplicity may have helped make the books easier to sell..<ref name=fukui2004p120 />