Create a PBB source document (.docx) with only this line in it:
[[Preface|link.pos=s1.v1.a0.w0.b1|res=anf01]]
Then compile it to a Personal Book and open it.
The link works fine (I finally got it working after a convoluted process; see this thread) but it shows up as tag source code in the TOC and the breadcrumb:
