Hi mordor
I would certainly second the recommendation of
Plant.
There are many websites with
Islamic coins, but most are based on personal
collections so are not comprehensive: eg.
http://alandaluscoinstonegawacollection.50g.com/ (
Spanish Islamic)
http://www.mbilbeisi.com/ (1,100 gold, 1,000 silver, few Ae)
http://islamiccoins.ancients.info/ (Maskukat
collection, now being dispersed)
For
Ottoman coins there is
http://www.osmanliparalari.com/ (in Turkish with some english, but not difficult to use despite that.)
The best general listing of
Islamic coins is
Album's 'A checklist of
Islamic coins'. This again has a brief
history of the dynasty, references to specialist works, and a listing of the coins ruler by ruler, with
rarity estimates. Unfortunately it is unillustrated.
A
very good general book on
Islamic coins is
Mitchiner's 'World of Islam', now reprinted,
still around $200 but well worth it.
Obviously, if you are interested in a particular geographical
area or dynasty there will be specialist works which I or other
members of the boards could recommend.
Best wishes
Alan