The publishing fee for each open access, online-only, article varies depends on the length as described below:

USD 100: 9,000 - 10,000 words, four figures, and two tables (each table limited to one page). The word count includes the abstract, references, and figure legends.

USD 120: 10,001 - 15,000 words, five figures, and three tables (each table limited to one page). The word count includes the abstract, references, and figure legends.

USD 150: 15,001 - 20,000 words, six figures, and four tables (each table restricted to one page). The word count includes the abstract, references, and figure legends.

How is the fee paid?

The author for correspondence of each book chapter is responsible for making, or arranging, the payment (for example, via the institution). An invoice will be issued to the author for correspondence after the editorial acceptance of the chapter with instructions for payment. 

Why is a fee charged?

A fee is charged to cover the costs of book production and making it freely available to the public. The typical costs associated with the production of a book include book processing, unrestricted free open access, technology, and post publication activities.

Article processing: Receiving articles, preliminary check of manuscripts to ensure adherence to guidelines, plagiarism check, communicating between authors/editors, organizing peer review, receiving revised manuscripts, copyediting, implementing corrections by authors, type setting, layout editing, proof reading, graphic design, cover design, assigning DOI to articles, reference checking, assigning DOIs to references, indexing, file conversion to XML in accordance with NCBI bookshelf guidelines, adding metadata to agreed industry standards, purchasing ISBN and barcodes, and project management.

Unrestricted free open access: All publications are freely available to the public. Anyone with an access to internet can access, read, and download the chapters without any restrictions. 

Technology: Online presence requires a publishing platform, hosting, necessary security features and email services. 

Post publication activities: Applying for indexing in various repositories, chapter promotion, marketing and continued online presence.

Fee waiver policy 

Low-income economies: If a chapter in an edited volume is contributed by authors from countries listed as low-income economies by the World Bank, we offer a 50% fee waiver upon producing proof from their institutions that all authors reside in that country, and that the research was done in that country or another lower-middle income economy. The list of countries is given below: 

Afghanistan, Benin, Burkina Faso, Burundi, Central African Republic, Chad, Comoros, Congo (Dem. Rep), Eritrea, Ethiopia, Gambia, Guinea, Guinea-Bissau, Haiti, Korea (Dem. People's Rep), Liberia, Madagascar, Malawi, Mali, Mozambique, Nepal, Niger, Rwanda, Senegal, Sierra Leone, Somalia, South Sudan, Tanzania, Togo, Uganda, Zimbabwe.

Lower-middle- income economies: If a chapter in an edited volume is contributed by authors from countries listed as lower-middle-income economies by the World Bank, we offer a 25% fee waiver upon producing proof from their institutions that all authors reside in that country, and that the research was done in that country or another lower-middle income economy. The list of countries is given below: 

Armenia, Bangladesh, Bhutan, Bolivia, Cabo Verde, Cambodia, Cameroon, Congo (Rep), Côte d'Ivoire, Djibouti, Egypt (Arab Rep), El Salvador, Ghana, Guatemala, Honduras, India, Indonesia, Kiribati, Kosovo, Kyrgyz Republic, Lao PDR, Lesothom, Mauritania, Micronesia (Fed. Sts), Moldova, Mongolia, Morocco, Myanmar, Nicaragua, Nigeria, Pakistan, Papua New Guinea, Philippines, Samoa, Solomon Islands, Sri Lanka, Sudan, Swaziland, Syrian Arab Republic, Tajikistan, Timor-Leste, Tonga, Tunisia, Ukraine, Uzbekistan, Vanuatu, Vietnam, West Bank and Gaza, Yemen (Rep), Zambia.