iggy: i think the "bevel and emboss" mentioned in that tutorial is from a separately downloaded script or plug-in called layer effects, so you won't find it in your gimp unless you've got that installed. you can make all the basic effects you need without downloading anything extra, though, you just need to go through some tutorials first to understand how - you could start with this:
http://gimpchat.com/viewtopic.php?f=23&t=6234#p77413re the textured text that wallace posted: you just do it the same way you would with a photo. you open the texture as a new layer, make a text layer to use as the base for a selection and then either invert selection and delete or make a layer mask based on the selection. if you save selection as path you can add stroked outlines afterwards. i think wallace also used a gimp default drop shadow on the text, which you can find under "filters -> light and shadows -> drop shadow".
if you want to make your own textures it's more complicated of course, and it's not something you explain in a single post. i recommend that you start by looking through the tutorials section here for nice effects and basic tutorials - there's heaps of good stuff there that you could use on ebook covers. if you find a tutorial youu want to try and get stuck doing it you can always make a post about it in that tutorial thread or in a new topic and there is bound to be someone in here who can help you on

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