storage engines comparing

http://www.mysqlperformanceblog.com/2007/01/08/innodb-vs-myisam-vs-falcon-benchmarks-part-1/

Thanks dear.
I saw it before.it was a good source but I need one that have reason of this graphs.
a theory based article about engines structure.
Thanks..

Hello again friends.
I need an article o book or any wrote that discussed about storage engines structure.
for example explain that what made MyISAM faster than other engines in Inserting data or any such thing that argue the graphs that came in upper post link.

http://www.mysqlperformanceblog.com/2007/01/08/innodb-vs-myisam-vs-falcon-benchmarks-part-1/

Thanks.