I have a 10-15ft section of tile lifting off my 7 year old pool. Also
a few other tiles in another spot coming off.

The pool company want a flat fee of $250 for the first 6ft and $8 a
foot after that.

Sounds steep to me - does this sound expensive?

Is this a job I should be able to handle myself (semi-handy). Are
there any good sites or books that explain how to make such a repair
myself?

Thanks in advance!