{%- assign count = site.theme_setting.slides_count | default: 4 -%}
{%- for book in site.books limit: count -%}
{%- assign is_odd = forloop.index | modulo: 2 -%}
{%- if is_odd == 1 -%}
{%- endif -%}
{%- if is_odd == 0 -%}
{%- endif -%}
{%- endfor -%}
{%- for book in site.books limit: count -%}
{%- endfor -%}