There are pretty good books from a German publisher
written from a Network Specialist, formerly a Bay Networks Germany employee.
About the books
But these books are mostly in German language and initiated from the old German Bay Networks marketing and sales team for the German speaking market. This strategy has been very successful up to 1998.
The quantities of all books sold have grown over a total of 100.000, that means, these books are really good and impressive with that much professional knowledge. Of coarse, the name Bay Networks is written on allmast every page, but thats marketing.
There is an ATM LAN Guide, a Gigabit Ethernet Guide, a Security Guide and a genreic Network guide, all using well known living and retired Bay Networks products