Fountain Pens of the World is also rather dated now but good if you want (some) information and pictures of pens worldwide. If however you don't mind restricting yourself to pens of the USA & UK, Lambrou's later volume 'Fountain Pens United States of America and United Kingdom' is a bit more up to date and has a higher text to pictures ratio. It should also be a lot cheaper and probably a better buy if you don't mind the more limited coverage.
Andy
I tried to find anything concerning fp's in our little library up here, last year. Net result - nil. So, they arranged an inter-library loan of Fountain Pens of the World, from Baton Rouge, LA. When it came in, I rushed home with it, and dove right in. I still don't know how that copy ever left the publisher's. The pg. nr's were in order, but the text on the pages skipped all over the place, ie., text on pg. 18 was continued on pg. 21 - then back to pg. 19, and that text continued on pg. 27. Etc. Etc. I carried it back and showed the librarian - we both got dizzy, trying to make sense of it ! I glanced at all the pretty pictures, but left the book with her, after half-hour or so. Disappointed, true - but I chuckled about it, for days after.
Take care,
JR