"Now Wait for Last Year" is a great, fast paced read, with similarities to some of his other novels, such as Ubik and Flow My Tears. You will enjoy from start to finish, laughing at the hilarity of some of the passages, feeling melancholy at the sadness of others.
The main character in the novel is Dr Eric Sweetscent, who goes from being the medical assistant to industrialist Virgil Ackerman to helping the enigmatic, insane and continually dying Gino Molinari. Alongside this, you will follow the story of several other characters, but the story mainly revolves around Eric Sweetscent and Molinari, and their progress with the intergalactic war that they are contending with.
Whilst it provides a fast paced, humorous departure from reality, "Now Wait for Last Year" is very well written in Dick's usual style, and deals with a lot of serious issues, most notably that of drug use, as well as focusing on the marital problems the protagonist faces with his wife. In addition to this, there are some hilarious parts of this novel which will literally make you laugh out loud (most being in relation to the amusing Gino Molinari).
The only, very minor criticism I can make is that, whilst being a fantastic read reminiscient of some of Dick's other novels, "Now wait for Last Year" does feel, to an extent, like a mere precursor to Ubik; the style and themes of the novel are very similar. However, both are outstanding reads. Having read Ubik first, it did feel like a repeat experience.
I would fully recommend this to any fan of Philip K Dick. It's well worth reading.