Hi. To get the book icon. Just use the @function and start typing the title of the document for the link.
For example, to link to New in JMP 17 and JMP Pro 17- Some Highlights (https://community.jmp.com/t5/Mastering-JMP/New-in-JMP-17-and-JMP-Pro-17-Some-Highlights/ta-p/556363), I typed @JMP 17 hightlights and got a list that included the correct link. I selected the correct document/page from the link, and voila.
Resources: