- Text on endless amounts of pages
- Colored text
- Bold, underlined etc. Text
- Hoverevents: Show text when you hover over the text
- Clickevents: execute a command when you click on the text (you need to have the permissions for it!)

▶ Copy Command:
give @p minecraft:written_book 1 0 {title:Tutorial,author:Me,pages:["{text:\"This is a Tutorial on how to make your own customized books\"}","{text:\"This is a New page\",extra:{text:\"\n\nNew Line\"},{text:\"\nColored text\",color:blue},{text:\"\nBold and Underlined\",underlined:true,bold:true,color:gold}]}","{text:\"Now on to the better stuff\",extra:[{text:\"\n\nHover Events\",hoverEvent:{action:show_text,value:\"Shows text when you hover over\"}},{text:\"\nClick Events\",clickEvent:{action:run_command,value:\"/say and this activates when the player clicks on it!\"}}]}"]}

▶ Split Up Command:
give @p minecraft:written_book 1 0
{
title:Tutorial,author:Me,
pages:[
"{text:\"This is a Tutorial on how to make your own customized books\"}"
,"{text:\"This is a New page\",extra:
{text:\"\n\nNew Line\"}
,{text:\"\nColored text\",color:blue}
,{text:\"\nBold and Underlined\",underlined:true,bold:true,color:gold}
]
}"
,"{text:\"Now on to the better stuff\",extra:[
{text:\"\n\nHover Events\"
,hoverEvent:{action:show_text,value:\"Shows text when you hover over\"}}
,{text:\"\nClick Events\"
,clickEvent:{action:run_command,value:\"/say and this activates when the player clicks on it!\"}}
]
}"
]
}

▶ Explaination Book from video
give @p minecraft:written_book 1 0 {title:Test,author:YourName,pages:["{text:\"This is the first page\",extra:{text:\"\n\nThis is the third line\",color:yellow,underlined:true,bold:true}]}","{text:\"New page is ready\",extra:[{text:\"\nhoverevent\",hoverEvent:{action:show_text,value:\"see it worked\"}},{text:\"\nclickevent\",clickEvent:{action:run_command,value:\"/tp ~ ~5 ~\"}}]}"]}