Hi, im going to Magaluf in mid July, peak season i know. I'm wondering would it be better to book asap or wait until the last few weeks and book a last minute deal then? Any ideas on who and how i should book the holiday aswell, travel agent, teletext or the internet. Any help appreciated, but basically the main question is my concern.

I was looking for different fare myself for a peak season. But when I got to the flight centre they quote was 1/3 of what I found over Internet so far (an I spend more time and effort). Don't try your luck for a last minute deal

My son turns 13 in June. I want to surprise him with a sun hol as we have never been. This would include his two younger brothers...is it worth holding off for last minute deals i.e. packed ready to go and book? any advice appreciated.

With 3 Kids under 13 I wouldn't recommend leaving it to the very last minute. There could be a lot of stress.
There are literally hundreds of web sites with cheap holidays, see the one below as an example.
Alternatively have a look through the holidays on Teletext you can get some bargains there. There's even a holiday chanel on SKY with some great bargains.