are there any paper books that could be a useful refernce for smartos administration?

I found this oracle solaris 11 book: amazon.com/Oracle-Solaris-Administr…on-Complete-Reference/dp/007179042X

but I'm not sure when illumos / smartos diverged from solaris

would a solaris 10 book be closer to smartos?

~2010, I think

bleb: as a reference for your day to day smartos administration, none will do. its different from solaris 10 and 11, you'll find that some of both apply (like zfs, smf, drivers) some is closer to 11 (networking for example) and some closer to 10 (no ips)

if you just want some usefull book, "Solaris Perfomnce and Tools" might still do a good enough job (dtrace and mdb are available on smartos) or if you seek deeper undersanding Solaris Internals (you should know C for that one)