The back cover says:

"When the TARDIS happens to materialise on an alien space craft the commander of the ship, the reptilian Monarch, invites the Doctor and his companions to continue their journey to Earth in his company.

Monarch's hospitality even extends to a generous offer to liberate the time-travellers from the shortcomings of their bodies and replicate them as androids - so much more practical.

Although Adric finds this proposal extremely attractive, the Doctor has good reason to be suspicious of Monarch's motives..."

The photographic cover has Peter Davison as the Fifth Doctor superimposed over a photograph of Stratford Johns in full make-up as Monarch.

In the phone booth at 22 Elizabeth Street (in front of Liquorland).

Released for the 2011 Tick Tock Release Challenge.

i found it at the phonebooth near coles on elizabeth street, on my way to the beach. i was really excited, it made my day!
yet to read it, but will hopefully do so soon.